312131321210 has 8 divisors (see below), whose sum is σ = 561836378196. Its totient is φ = 124852528480.

The previous prime is 312131321189. The next prime is 312131321213. The reversal of 312131321210 is 12123131213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 306569293969 + 5562027241 = 553687^2 + 74579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (312131321213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15606566051 + ... + 15606566070.

Almost surely, 2^312131321210 is an apocalyptic number.

312131321210 is a deficient number, since it is larger than the sum of its proper divisors (249705056986).

312131321210 is a wasteful number, since it uses less digits than its factorization.

312131321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31213132128.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 312131321210 its reverse (12123131213), we get a palindrome (324254452423).

The spelling of 312131321210 in words is "three hundred twelve billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred ten".