23221312131 has 8 divisors (see below), whose sum is σ = 31035294544. Its totient is φ = 15444102240.

The previous prime is 23221312069. The next prime is 23221312133. The reversal of 23221312131 is 13121312232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23221312131 - 2¹¹ = 23221310083 is a prime.

It is a super-2 number, since 2×23221312131² (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 = 23221312098 and 23221312107.

It is not an unprimeable number, because it can be changed into a prime (23221312133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9191656 + ... + 9194181.

It is an arithmetic number, because the mean of its divisors is an integer number (3879411818).

Almost surely, 2^23221312131 is an apocalyptic number.

23221312131 is a deficient number, since it is larger than the sum of its proper divisors (7813982413).

23221312131 is a wasteful number, since it uses less digits than its factorization.

23221312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18386261.

The product of its digits is 432, while the sum is 21.

Adding to 23221312131 its reverse (13121312232), we get a palindrome (36342624363).

The spelling of 23221312131 in words is "twenty-three billion, two hundred twenty-one million, three hundred twelve thousand, one hundred thirty-one".