23001220131 has 16 divisors (see below), whose sum is σ = 31155931008. Its totient is φ = 15090768000.

The previous prime is 23001220117. The next prime is 23001220141. The reversal of 23001220131 is 13102210032.

It is not a de Polignac number, because 23001220131 - 2²² = 22997025827 is a prime.

It is a super-2 number, since 2×23001220131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23001220131.

It is not an unprimeable number, because it can be changed into a prime (23001220141) 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, 156811 + ... + 265691.

It is an arithmetic number, because the mean of its divisors is an integer number (1947245688).

Almost surely, 2^23001220131 is an apocalyptic number.

23001220131 is a deficient number, since it is larger than the sum of its proper divisors (8154710877).

23001220131 is a wasteful number, since it uses less digits than its factorization.

23001220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110002.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 23001220131 its reverse (13102210032), we get a palindrome (36103430163).

The spelling of 23001220131 in words is "twenty-three billion, one million, two hundred twenty thousand, one hundred thirty-one".