31212103121110 has 16 divisors (see below), whose sum is σ = 56182283215632. Its totient is φ = 12484730671200.

The previous prime is 31212103121081. The next prime is 31212103121113. The reversal of 31212103121110 is 1112130121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212103121113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12631761 + ... + 14899180.

It is an arithmetic number, because the mean of its divisors is an integer number (3511392700977).

Almost surely, 2^{31212103121110} is an apocalyptic number.

31212103121110 is a deficient number, since it is larger than the sum of its proper divisors (24970180094522).

31212103121110 is a wasteful number, since it uses less digits than its factorization.

31212103121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27644319.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31212103121110 its reverse (1112130121213), we get a palindrome (32324233242323).

The spelling of 31212103121110 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred twenty-one thousand, one hundred ten".