21010321023131 has 32 divisors (see below), whose sum is σ = 24482235875328. Its totient is φ = 17838298225440.

The previous prime is 21010321023113. The next prime is 21010321023151. The reversal of 21010321023131 is 13132012301012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21010321023131 is a prime.

It is a super-2 number, since 2×21010321023131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010321023151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28872500 + ... + 29591246.

It is an arithmetic number, because the mean of its divisors is an integer number (765069871104).

Almost surely, 2^{21010321023131} is an apocalyptic number.

21010321023131 is a deficient number, since it is larger than the sum of its proper divisors (3471914852197).

21010321023131 is a wasteful number, since it uses less digits than its factorization.

21010321023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721511.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21010321023131 its reverse (13132012301012), we get a palindrome (34142333324143).

The spelling of 21010321023131 in words is "twenty-one trillion, ten billion, three hundred twenty-one million, twenty-three thousand, one hundred thirty-one".