221431102131031 has 16 divisors (see below), whose sum is σ = 242965588055904. Its totient is φ = 200539725969024.

The previous prime is 221431102131023. The next prime is 221431102131037. The reversal of 221431102131031 is 130131201134122.

It is not a de Polignac number, because 221431102131031 - 2³ = 221431102131023 is a prime.

It is a super-2 number, since 2×221431102131031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221431102130987 and 221431102131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431102131037) 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, 86759805 + ... + 89275561.

It is an arithmetic number, because the mean of its divisors is an integer number (15185349253494).

Almost surely, 2^{221431102131031} is an apocalyptic number.

221431102131031 is a deficient number, since it is larger than the sum of its proper divisors (21534485924873).

221431102131031 is a wasteful number, since it uses less digits than its factorization.

221431102131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643570.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 221431102131031 its reverse (130131201134122), we get a palindrome (351562303265153).

The spelling of 221431102131031 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, one hundred two million, one hundred thirty-one thousand, thirty-one".