31120020330012 has 108 divisors (see below), whose sum is σ = 81698540883960. Its totient is φ = 10371735245664.

The previous prime is 31120020330001. The next prime is 31120020330037. The reversal of 31120020330012 is 21003302002113.

31120020330012 is a `hidden beast` number, since 31 + 120 + 0 + 203 + 300 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 175982623 + ... + 176159369.

Almost surely, 2^{31120020330012} 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 31120020330012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40849270441980).

31120020330012 is an abundant number, since it is smaller than the sum of its proper divisors (50578520553948).

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

31120020330012 is an equidigital number, since it uses as much as digits as its factorization.

31120020330012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183484 (or 183461 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31120020330012 its reverse (21003302002113), we get a palindrome (52123322332125).

The spelling of 31120020330012 in words is "thirty-one trillion, one hundred twenty billion, twenty million, three hundred thirty thousand, twelve".