231313120122 has 64 divisors (see below), whose sum is σ = 538783856640. Its totient is φ = 64835557056.

The previous prime is 231313120043. The next prime is 231313120139. The reversal of 231313120122 is 221021313132.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1110948 + ... + 1302624.

It is an arithmetic number, because the mean of its divisors is an integer number (8418497760).

Almost surely, 2^231313120122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231313120122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269391928320).

231313120122 is an abundant number, since it is smaller than the sum of its proper divisors (307470736518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231313120122 is a wasteful number, since it uses less digits than its factorization.

231313120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192235.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231313120122 its reverse (221021313132), we get a palindrome (452334433254).

The spelling of 231313120122 in words is "two hundred thirty-one billion, three hundred thirteen million, one hundred twenty thousand, one hundred twenty-two".