31212103013320 has 64 divisors (see below), whose sum is σ = 70745917207680. Its totient is φ = 12392956886016.

The previous prime is 31212103013291. The next prime is 31212103013383. The reversal of 31212103013320 is 2331030121213.

31212103013320 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 31212103013291 and 31212103013300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2040124 + ... + 8160043.

It is an arithmetic number, because the mean of its divisors is an integer number (1105404956370).

Almost surely, 2^{31212103013320} is an apocalyptic number.

It is an amenable number.

31212103013320 is an abundant number, since it is smaller than the sum of its proper divisors (39533814194360).

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

31212103013320 is a wasteful number, since it uses less digits than its factorization.

31212103013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200742 (or 10200738 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31212103013320 its reverse (2331030121213), we get a palindrome (33543133134533).

The spelling of 31212103013320 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, thirteen thousand, three hundred twenty".