23011111131 has 8 divisors (see below), whose sum is σ = 30682229760. Its totient is φ = 15340366632.

The previous prime is 23011111129. The next prime is 23011111163. The reversal of 23011111131 is 13111111032.

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

It is not a de Polignac number, because 23011111131 - 2¹ = 23011111129 is a prime.

It is a super-2 number, since 2×23011111131² (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 23011111131.

It is not an unprimeable number, because it can be changed into a prime (23011110131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118930 + ... + 245288.

It is an arithmetic number, because the mean of its divisors is an integer number (3835278720).

Almost surely, 2^23011111131 is an apocalyptic number.

23011111131 is a deficient number, since it is larger than the sum of its proper divisors (7671118629).

23011111131 is a wasteful number, since it uses less digits than its factorization.

23011111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187065.

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

Adding to 23011111131 its reverse (13111111032), we get a palindrome (36122222163).

Subtracting from 23011111131 its reverse (13111111032), we obtain a palindrome (9900000099).

The spelling of 23011111131 in words is "twenty-three billion, eleven million, one hundred eleven thousand, one hundred thirty-one".