231123320201999 has 4 divisors (see below), whose sum is σ = 244718809625664. Its totient is φ = 217527830778336.

The previous prime is 231123320201993. The next prime is 231123320202007. The reversal of 231123320201999 is 999102023321132.

231123320201999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231123320201999 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 (231123320201993) 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, 6797744711807 + ... + 6797744711840.

It is an arithmetic number, because the mean of its divisors is an integer number (61179702406416).

Almost surely, 2^{231123320201999} is an apocalyptic number.

231123320201999 is a deficient number, since it is larger than the sum of its proper divisors (13595489423665).

231123320201999 is a wasteful number, since it uses less digits than its factorization.

231123320201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13595489423664.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 231123320201999 in words is "two hundred thirty-one trillion, one hundred twenty-three billion, three hundred twenty million, two hundred one thousand, nine hundred ninety-nine".