23131320011 has 16 divisors (see below), whose sum is σ = 24833304000. Its totient is φ = 21469206528.

The previous prime is 23131319983. The next prime is 23131320019. The reversal of 23131320011 is 11002313132.

It is a cyclic number.

It is not a de Polignac number, because 23131320011 - 2³⁰ = 22057578187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131320019) 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, 352025 + ... + 412533.

It is an arithmetic number, because the mean of its divisors is an integer number (1552081500).

Almost surely, 2^23131320011 is an apocalyptic number.

23131320011 is a deficient number, since it is larger than the sum of its proper divisors (1701983989).

23131320011 is a wasteful number, since it uses less digits than its factorization.

23131320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60838.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 23131320011 its reverse (11002313132), we get a palindrome (34133633143).

The spelling of 23131320011 in words is "twenty-three billion, one hundred thirty-one million, three hundred twenty thousand, eleven".