31120012210000 has 300 divisors, whose sum is σ = 87692435688000. Its totient is φ = 10664045280000.

The previous prime is 31120012209989. The next prime is 31120012210031. The reversal of 31120012210000 is 1221002113.

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 59 ways as a sum of consecutive naturals, for example, 979494115 + ... + 979525885.

It is an arithmetic number, because the mean of its divisors is an integer number (292308118960).

Almost surely, 2^{31120012210000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31120012210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43846217844000).

31120012210000 is an abundant number, since it is smaller than the sum of its proper divisors (56572423478000).

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

31120012210000 is a wasteful number, since it uses less digits than its factorization.

31120012210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33812 (or 33784 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31120012210000 its reverse (1221002113), we get a palindrome (31121233212113).

The spelling of 31120012210000 in words is "thirty-one trillion, one hundred twenty billion, twelve million, two hundred ten thousand".