31212103133130 has 32 divisors (see below), whose sum is σ = 78165962630784. Its totient is φ = 7961348045376.

The previous prime is 31212103133129. The next prime is 31212103133171. The reversal of 31212103133130 is 3133130121213.

It is a self number, because there is not a number n which added to its sum of digits gives 31212103133130.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22617465349 + ... + 22617466728.

It is an arithmetic number, because the mean of its divisors is an integer number (2442686332212).

Almost surely, 2^{31212103133130} is an apocalyptic number.

31212103133130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31212103133130 is an abundant number, since it is smaller than the sum of its proper divisors (46953859497654).

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

31212103133130 is a wasteful number, since it uses less digits than its factorization.

31212103133130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45234932110.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31212103133130 its reverse (3133130121213), we get a palindrome (34345233254343).

The spelling of 31212103133130 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thirty-three thousand, one hundred thirty".