23121013031 has 4 divisors (see below), whose sum is σ = 23121396552. Its totient is φ = 23120629512.

The previous prime is 23121013001. The next prime is 23121013087. The reversal of 23121013031 is 13031012132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23121013031 - 2³⁴ = 5941143847 is a prime.

It is a super-2 number, since 2×23121013031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121013001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79376 + ... + 229221.

It is an arithmetic number, because the mean of its divisors is an integer number (5780349138).

Almost surely, 2^23121013031 is an apocalyptic number.

23121013031 is a deficient number, since it is larger than the sum of its proper divisors (383521).

23121013031 is an equidigital number, since it uses as much as digits as its factorization.

23121013031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383520.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 23121013031 its reverse (13031012132), we get a palindrome (36152025163).

It can be divided in two parts, 2312101 and 3031, that added together give a palindrome (2315132).

The spelling of 23121013031 in words is "twenty-three billion, one hundred twenty-one million, thirteen thousand, thirty-one".