23121030331 has 16 divisors (see below), whose sum is σ = 26484019200. Its totient is φ = 19773098208.

The previous prime is 23121030281. The next prime is 23121030371. The reversal of 23121030331 is 13303012132.

It is a cyclic number.

It is not a de Polignac number, because 23121030331 - 2⁹ = 23121029819 is a prime.

It is a super-2 number, since 2×23121030331² (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 = 23121030299 and 23121030308.

It is not an unprimeable number, because it can be changed into a prime (23121030371) 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, 8288685 + ... + 8291473.

It is an arithmetic number, because the mean of its divisors is an integer number (1655251200).

Almost surely, 2^23121030331 is an apocalyptic number.

23121030331 is a deficient number, since it is larger than the sum of its proper divisors (3362988869).

23121030331 is a wasteful number, since it uses less digits than its factorization.

23121030331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 23121030331 its reverse (13303012132), we get a palindrome (36424042463).

The spelling of 23121030331 in words is "twenty-three billion, one hundred twenty-one million, thirty thousand, three hundred thirty-one".