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201221012101 = 7941911635227
BaseRepresentation
bin1011101101100110110…
…1001111101010000101
3201020101102211112012211
42323121231033222011
511244100034341401
6232234544343421
720352305245024
oct2733155175205
9636342745184
10201221012101
117837901970a
1232bb8614b71
1315c8a28c645
149a4c3208bb
15537a760951
hex2ed9b4fa85

201221012101 has 16 divisors (see below), whose sum is σ = 204469171200. Its totient is φ = 197991441648.

The previous prime is 201221012093. The next prime is 201221012117. The reversal of 201221012101 is 101210122102.

Adding to 201221012101 its reverse (101210122102), we get a palindrome (302431134203).

It is a cyclic number.

It is not a de Polignac number, because 201221012101 - 23 = 201221012093 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 (201221012141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38493850 + ... + 38499076.

It is an arithmetic number, because the mean of its divisors is an integer number (12779323200).

Almost surely, 2201221012101 is an apocalyptic number.

It is an amenable number.

201221012101 is a deficient number, since it is larger than the sum of its proper divisors (3248159099).

201221012101 is a wasteful number, since it uses less digits than its factorization.

201221012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6888.

The product of its (nonzero) digits is 16, while the sum is 13.

The spelling of 201221012101 in words is "two hundred one billion, two hundred twenty-one million, twelve thousand, one hundred one".

Divisors: 1 79 419 1163 5227 33101 91877 412933 487297 2190113 6079001 38496463 173018927 480241079 2547101419 201221012101