231220211200013 has 32 divisors (see below), whose sum is σ = 272895053740032. Its totient is φ = 191711815545600.

The previous prime is 231220211200009. The next prime is 231220211200067. The reversal of 231220211200013 is 310002112022132.

It is not a de Polignac number, because 231220211200013 - 2² = 231220211200009 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 (231220211203013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7186761995 + ... + 7186794167.

It is an arithmetic number, because the mean of its divisors is an integer number (8527970429376).

Almost surely, 2^{231220211200013} is an apocalyptic number.

It is an amenable number.

231220211200013 is a deficient number, since it is larger than the sum of its proper divisors (41674842540019).

231220211200013 is a wasteful number, since it uses less digits than its factorization.

231220211200013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45645.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231220211200013 its reverse (310002112022132), we get a palindrome (541222323222145).

The spelling of 231220211200013 in words is "two hundred thirty-one trillion, two hundred twenty billion, two hundred eleven million, two hundred thousand, thirteen".