231213020202 has 24 divisors (see below), whose sum is σ = 514501046436. Its totient is φ = 74988006336.

The previous prime is 231213020173. The next prime is 231213020257. The reversal of 231213020202 is 202020312132.

231213020202 is a `hidden beast` number, since 2 + 312 + 130 + 20 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 220252814721 + 10960205481 = 469311^2 + 104691^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173582683 + ... + 173584014.

Almost surely, 2^231213020202 is an apocalyptic number.

231213020202 is an abundant number, since it is smaller than the sum of its proper divisors (283288026234).

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

231213020202 is a wasteful number, since it uses less digits than its factorization.

231213020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347166742 (or 347166739 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231213020202 its reverse (202020312132), we get a palindrome (433233332334).

It can be divided in two parts, 2312130 and 20202, that added together give a palindrome (2332332).

The spelling of 231213020202 in words is "two hundred thirty-one billion, two hundred thirteen million, twenty thousand, two hundred two".