23131202009999 has 4 divisors (see below), whose sum is σ = 23160593627064. Its totient is φ = 23101810392936.

The previous prime is 23131202009977. The next prime is 23131202010001. The reversal of 23131202009999 is 99990020213132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23131202009999 - 2¹² = 23131202005903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131202009099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14695807352 + ... + 14695808925.

It is an arithmetic number, because the mean of its divisors is an integer number (5790148406766).

Almost surely, 2^{23131202009999} is an apocalyptic number.

23131202009999 is a deficient number, since it is larger than the sum of its proper divisors (29391617065).

23131202009999 is an equidigital number, since it uses as much as digits as its factorization.

23131202009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29391617064.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 23131202009999 in words is "twenty-three trillion, one hundred thirty-one billion, two hundred two million, nine thousand, nine hundred ninety-nine".