23121133031 has 16 divisors (see below), whose sum is σ = 24259276800. Its totient is φ = 22008974400.

The previous prime is 23121133027. The next prime is 23121133037. The reversal of 23121133031 is 13033112132.

It is a cyclic number.

It is not a de Polignac number, because 23121133031 - 2² = 23121133027 is a prime.

It is a super-2 number, since 2×23121133031² (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 = 23121132994 and 23121133012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121133037) 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, 954275 + ... + 978203.

It is an arithmetic number, because the mean of its divisors is an integer number (1516204800).

Almost surely, 2^23121133031 is an apocalyptic number.

23121133031 is a deficient number, since it is larger than the sum of its proper divisors (1138143769).

23121133031 is a wasteful number, since it uses less digits than its factorization.

23121133031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24470.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 23121133031 its reverse (13033112132), we get a palindrome (36154245163).

The spelling of 23121133031 in words is "twenty-three billion, one hundred twenty-one million, one hundred thirty-three thousand, thirty-one".