31212113120200 has 48 divisors (see below), whose sum is σ = 76387540014000. Its totient is φ = 11827748128320.

The previous prime is 31212113120113. The next prime is 31212113120207. The reversal of 31212113120200 is 202131121213.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (31212113120207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4106853190 + ... + 4106860789.

It is an arithmetic number, because the mean of its divisors is an integer number (1591407083625).

Almost surely, 2^{31212113120200} is an apocalyptic number.

It is an amenable number.

31212113120200 is an abundant number, since it is smaller than the sum of its proper divisors (45175426893800).

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

31212113120200 is a wasteful number, since it uses less digits than its factorization.

31212113120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213714014 (or 8213714005 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31212113120200 its reverse (202131121213), we get a palindrome (31414244241413).

The spelling of 31212113120200 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirteen million, one hundred twenty thousand, two hundred".