23111011131 has 16 divisors (see below), whose sum is σ = 35137103904. Its totient is φ = 13385562624.

The previous prime is 23111011123. The next prime is 23111011139. The reversal of 23111011131 is 13111011132.

It is an interprime number because it is at equal distance from previous prime (23111011123) and next prime (23111011139).

It is not a de Polignac number, because 23111011131 - 2³ = 23111011123 is a prime.

It is a super-2 number, since 2×23111011131² (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 23111011131.

It is not an unprimeable number, because it can be changed into a prime (23111011139) 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, 17428456 + ... + 17429781.

It is an arithmetic number, because the mean of its divisors is an integer number (2196068994).

Almost surely, 2^23111011131 is an apocalyptic number.

23111011131 is a deficient number, since it is larger than the sum of its proper divisors (12026092773).

23111011131 is a wasteful number, since it uses less digits than its factorization.

23111011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34858270.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 23111011131 its reverse (13111011132), we get a palindrome (36222022263).

Subtracting from 23111011131 its reverse (13111011132), we obtain a palindrome (9999999999).

The spelling of 23111011131 in words is "twenty-three billion, one hundred eleven million, eleven thousand, one hundred thirty-one".