31033220113220 has 288 divisors, whose sum is σ = 76321279036800. Its totient is φ = 10561217052672.

The previous prime is 31033220113153. The next prime is 31033220113253. The reversal of 31033220113220 is 2231102233013.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 367488842 + ... + 367573278.

It is an arithmetic number, because the mean of its divisors is an integer number (265004441100).

Almost surely, 2^{31033220113220} 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 31033220113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38160639518400).

31033220113220 is an abundant number, since it is smaller than the sum of its proper divisors (45288058923580).

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

31033220113220 is a wasteful number, since it uses less digits than its factorization.

31033220113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84647 (or 84632 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31033220113220 its reverse (2231102233013), we get a palindrome (33264322346233).

The spelling of 31033220113220 in words is "thirty-one trillion, thirty-three billion, two hundred twenty million, one hundred thirteen thousand, two hundred twenty".