23121131031 has 6 divisors (see below), whose sum is σ = 33397189280. Its totient is φ = 15414087348.

The previous prime is 23121131017. The next prime is 23121131039. The reversal of 23121131031 is 13013112132.

23121131031 is a `hidden beast` number, since 2 + 312 + 11 + 310 + 31 = 666.

It is not a de Polignac number, because 23121131031 - 2⁹ = 23121130519 is a prime.

It is a super-2 number, since 2×23121131031² (a number of 22 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 = 23121130995 and 23121131013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121131039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1284507271 + ... + 1284507288.

Almost surely, 2^23121131031 is an apocalyptic number.

23121131031 is a deficient number, since it is larger than the sum of its proper divisors (10276058249).

23121131031 is a wasteful number, since it uses less digits than its factorization.

23121131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569014565 (or 2569014562 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 23121131031 its reverse (13013112132), we get a palindrome (36134243163).

The spelling of 23121131031 in words is "twenty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, thirty-one".