23221023131 has 4 divisors (see below), whose sum is σ = 23221588992. Its totient is φ = 23220457272.

The previous prime is 23221023121. The next prime is 23221023139. The reversal of 23221023131 is 13132012232.

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 23221023131 - 2²² = 23216828827 is a prime.

It is a super-2 number, since 2×23221023131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23221023139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216116 + ... + 305201.

It is an arithmetic number, because the mean of its divisors is an integer number (5805397248).

Almost surely, 2^23221023131 is an apocalyptic number.

23221023131 is a deficient number, since it is larger than the sum of its proper divisors (565861).

23221023131 is an equidigital number, since it uses as much as digits as its factorization.

23221023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565860.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23221023131 its reverse (13132012232), we get a palindrome (36353035363).

The spelling of 23221023131 in words is "twenty-three billion, two hundred twenty-one million, twenty-three thousand, one hundred thirty-one".