231312221202 has 16 divisors (see below), whose sum is σ = 462629194272. Its totient is φ = 77103281760.

The previous prime is 231312221167. The next prime is 231312221209. The reversal of 231312221202 is 202122213132.

It is not an unprimeable number, because it can be changed into a prime (231312221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923302 + ... + 1146782.

It is an arithmetic number, because the mean of its divisors is an integer number (28914324642).

Almost surely, 2^231312221202 is an apocalyptic number.

231312221202 is an abundant number, since it is smaller than the sum of its proper divisors (231316973070).

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

231312221202 is a wasteful number, since it uses less digits than its factorization.

231312221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395993.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 231312221202 its reverse (202122213132), we get a palindrome (433434434334).

The spelling of 231312221202 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred twenty-one thousand, two hundred two".