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121200212209999 = 13172389491545647
BaseRepresentation
bin11011100011101100011111…
…100110000111000101001111
3120220010121221011210112022111
4123203230133212013011033
5111341221013311204444
61105434335301524451
734346266146510226
oct3343543746070517
9526117834715274
10121200212209999
11356887a312286a
12117154b5a13727
135282191985410
1421d019b837cbd
15e02a67cad234
hex6e3b1f98714f

121200212209999 has 64 divisors (see below), whose sum is σ = 146127502725120. Its totient is φ = 99383351316480.

The previous prime is 121200212209961. The next prime is 121200212210023. The reversal of 121200212209999 is 999902212002121.

It is a cyclic number.

It is not a de Polignac number, because 121200212209999 - 211 = 121200212207951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200212200999) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 221849194 + ... + 222394840.

It is an arithmetic number, because the mean of its divisors is an integer number (2283242230080).

Almost surely, 2121200212209999 is an apocalyptic number.

121200212209999 is a deficient number, since it is larger than the sum of its proper divisors (24927290515121).

121200212209999 is a wasteful number, since it uses less digits than its factorization.

121200212209999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546280.

The product of its (nonzero) digits is 209952, while the sum is 49.

The spelling of 121200212209999 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twelve million, two hundred nine thousand, nine hundred ninety-nine".

Divisors: 1 13 17 23 89 221 299 391 491 1157 1513 2047 5083 6383 8347 11293 19669 26611 34799 43699 108511 146809 191981 452387 545647 568087 742883 1005077 2495753 7093411 9275999 9657479 12549881 13066001 17086309 48562583 120587987 163148453 213347977 222122017 267912677 631313579 825563911 1116939409 2773523701 3482864801 4554515509 6161991571 10732330843 14520212317 18987969953 23844228253 59208701617 80105890423 104753856707 246843609389 309974967289 405351880301 548417249819 1361800137191 5269574443913 7129424247647 9323093246923 121200212209999