31212120121010 has 64 divisors (see below), whose sum is σ = 56591966269440. Its totient is φ = 12394033740480.

The previous prime is 31212120121001. The next prime is 31212120121033. The reversal of 31212120121010 is 1012102121213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212120121010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2164044659 + ... + 2164059081.

It is an arithmetic number, because the mean of its divisors is an integer number (884249472960).

Almost surely, 2^{31212120121010} is an apocalyptic number.

31212120121010 is a deficient number, since it is larger than the sum of its proper divisors (25379846148430).

31212120121010 is a wasteful number, since it uses less digits than its factorization.

31212120121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17183.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 31212120121010 its reverse (1012102121213), we get a palindrome (32224222242223).

The spelling of 31212120121010 in words is "thirty-one trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, ten".