231099718122 has 144 divisors (see below), whose sum is σ = 664169497992. Its totient is φ = 57364070400.

The previous prime is 231099718079. The next prime is 231099718147. The reversal of 231099718122 is 221817990132.

It can be written as a sum of positive squares in 4 ways, for example, as 213657497361 + 17442220761 = 462231^2 + 132069^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 397879 + ... + 787722.

Almost surely, 2^231099718122 is an apocalyptic number.

231099718122 is an abundant number, since it is smaller than the sum of its proper divisors (433069779870).

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

231099718122 is a wasteful number, since it uses less digits than its factorization.

231099718122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185653 (or 1185643 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 231099718122 in words is "two hundred thirty-one billion, ninety-nine million, seven hundred eighteen thousand, one hundred twenty-two".