31212013199994 has 144 divisors (see below), whose sum is σ = 76172285105280. Its totient is φ = 9224281123200.

The previous prime is 31212013199993. The next prime is 31212013200013. The reversal of 31212013199994 is 49999131021213.

31212013199994 is a `hidden beast` number, since 31 + 2 + 1 + 201 + 319 + 9 + 9 + 94 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 31212013199994.

It is not an unprimeable number, because it can be changed into a prime (31212013199993) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 262387359 + ... + 262506285.

It is an arithmetic number, because the mean of its divisors is an integer number (528974202120).

Almost surely, 2^{31212013199994} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212013199994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38086142552640).

31212013199994 is an abundant number, since it is smaller than the sum of its proper divisors (44960271905286).

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

31212013199994 is a wasteful number, since it uses less digits than its factorization.

31212013199994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121937 (or 121923 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 31212013199994 in words is "thirty-one trillion, two hundred twelve billion, thirteen million, one hundred ninety-nine thousand, nine hundred ninety-four".