231131312210202 has 16 divisors (see below), whose sum is σ = 462266607163872. Its totient is φ = 77043106946160.

The previous prime is 231131312210167. The next prime is 231131312210231. The reversal of 231131312210202 is 202012213131132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165192949 + ... + 166586232.

It is an arithmetic number, because the mean of its divisors is an integer number (28891662947742).

Almost surely, 2^{231131312210202} is an apocalyptic number.

231131312210202 is an abundant number, since it is smaller than the sum of its proper divisors (231135294953670).

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

231131312210202 is a wasteful number, since it uses less digits than its factorization.

231131312210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331895293.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 231131312210202 its reverse (202012213131132), we get a palindrome (433143525341334).

The spelling of 231131312210202 in words is "two hundred thirty-one trillion, one hundred thirty-one billion, three hundred twelve million, two hundred ten thousand, two hundred two".