123021022131 has 20 divisors (see below), whose sum is σ = 210025308592. Its totient is φ = 70297726608.

The previous prime is 123021022127. The next prime is 123021022147. The reversal of 123021022131 is 131220120321.

123021022131 is a `hidden beast` number, since 1 + 230 + 210 + 221 + 3 + 1 = 666.

It is not a de Polignac number, because 123021022131 - 2² = 123021022127 is a prime.

It is a super-2 number, since 2×123021022131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123021002131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 108483580 + ... + 108484713.

Almost surely, 2^123021022131 is an apocalyptic number.

123021022131 is a deficient number, since it is larger than the sum of its proper divisors (87004286461).

123021022131 is an equidigital number, since it uses as much as digits as its factorization.

123021022131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216968312 (or 216968303 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123021022131 its reverse (131220120321), we get a palindrome (254241142452).

The spelling of 123021022131 in words is "one hundred twenty-three billion, twenty-one million, twenty-two thousand, one hundred thirty-one".