31013222212120 has 128 divisors (see below), whose sum is σ = 71503990194240. Its totient is φ = 12103081205760.

The previous prime is 31013222212103. The next prime is 31013222212123. The reversal of 31013222212120 is 2121222231013.

It is a junction number, because it is equal to n+sod(n) for n = 31013222212091 and 31013222212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013222212123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113074350 + ... + 113348290.

Almost surely, 2^{31013222212120} 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 31013222212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35751995097120).

31013222212120 is an abundant number, since it is smaller than the sum of its proper divisors (40490767982120).

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

31013222212120 is a wasteful number, since it uses less digits than its factorization.

31013222212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274445 (or 274441 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31013222212120 its reverse (2121222231013), we get a palindrome (33134444443133).

The spelling of 31013222212120 in words is "thirty-one trillion, thirteen billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty".