31231213112210 has 16 divisors (see below), whose sum is σ = 56360698219800. Its totient is φ = 12460370885376.

The previous prime is 31231213112201. The next prime is 31231213112251. The reversal of 31231213112210 is 1221131213213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28933845402361 + 2297367709849 = 5379019^2 + 1515707^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4014290855 + ... + 4014298634.

Almost surely, 2^{31231213112210} is an apocalyptic number.

31231213112210 is a deficient number, since it is larger than the sum of its proper divisors (25129485107590).

31231213112210 is a wasteful number, since it uses less digits than its factorization.

31231213112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028589885.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31231213112210 its reverse (1221131213213), we get a palindrome (32452344325423).

The spelling of 31231213112210 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred thirteen million, one hundred twelve thousand, two hundred ten".