21100313103231 has 16 divisors (see below), whose sum is σ = 28469317096800. Its totient is φ = 13900070584320.

The previous prime is 21100313103229. The next prime is 21100313103257. The reversal of 21100313103231 is 13230131300112.

It is a happy number.

It is not a de Polignac number, because 21100313103231 - 2¹ = 21100313103229 is a prime.

It is a super-2 number, since 2×21100313103231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100313103198 and 21100313103207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100313123231) 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, 122204610 + ... + 122377151.

It is an arithmetic number, because the mean of its divisors is an integer number (1779332318550).

Almost surely, 2^{21100313103231} is an apocalyptic number.

21100313103231 is a deficient number, since it is larger than the sum of its proper divisors (7369003993569).

21100313103231 is a wasteful number, since it uses less digits than its factorization.

21100313103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244582106.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21100313103231 its reverse (13230131300112), we get a palindrome (34330444403343).

The spelling of 21100313103231 in words is "twenty-one trillion, one hundred billion, three hundred thirteen million, one hundred three thousand, two hundred thirty-one".