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10001121221 = 713293789739
BaseRepresentation
bin10010101000001110…
…01111111111000101
3221210222212121011002
421110013033333011
5130440241334341
64332222423045
7502560061550
oct112407177705
927728777132
1010001121221
114272410443
121b31431a85
13c34cc0910
146ac375697
153d803029b
hex2541cffc5

10001121221 has 16 divisors (see below), whose sum is σ = 12733526400. Its totient is φ = 7640111808.

The previous prime is 10001121197. The next prime is 10001121223. The reversal of 10001121221 is 12212110001.

It is not a de Polignac number, because 10001121221 - 26 = 10001121157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001121223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1892231 + ... + 1897508.

It is an arithmetic number, because the mean of its divisors is an integer number (795845400).

Almost surely, 210001121221 is an apocalyptic number.

It is an amenable number.

10001121221 is a deficient number, since it is larger than the sum of its proper divisors (2732405179).

10001121221 is a wasteful number, since it uses less digits than its factorization.

10001121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789788.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10001121221 its reverse (12212110001), we get a palindrome (22213231222).

The spelling of 10001121221 in words is "ten billion, one million, one hundred twenty-one thousand, two hundred twenty-one".

Divisors: 1 7 13 29 91 203 377 2639 3789739 26528173 49266607 109902431 344866249 769317017 1428731603 10001121221