31312211200212 has 24 divisors (see below), whose sum is σ = 73186292634336. Its totient is φ = 10419622804768.

The previous prime is 31312211200199. The next prime is 31312211200301. The reversal of 31312211200212 is 21200211221313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2222608743 + ... + 2222622830.

It is an arithmetic number, because the mean of its divisors is an integer number (3049428859764).

Almost surely, 2^{31312211200212} is an apocalyptic number.

It is an amenable number.

31312211200212 is an abundant number, since it is smaller than the sum of its proper divisors (41874081434124).

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

31312211200212 is a wasteful number, since it uses less digits than its factorization.

31312211200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445232167 (or 4445232165 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31312211200212 its reverse (21200211221313), we get a palindrome (52512422421525).

The spelling of 31312211200212 in words is "thirty-one trillion, three hundred twelve billion, two hundred eleven million, two hundred thousand, two hundred twelve".