31013110111220 has 12 divisors (see below), whose sum is σ = 65127531233604. Its totient is φ = 12405244044480.

The previous prime is 31013110111213. The next prime is 31013110111231. The reversal of 31013110111220 is 2211101131013.

31013110111220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12684111298576 + 18328998812644 = 3561476^2 + 4281238^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775327752761 + ... + 775327752800.

It is an arithmetic number, because the mean of its divisors is an integer number (5427294269467).

Almost surely, 2^{31013110111220} is an apocalyptic number.

It is an amenable number.

31013110111220 is an abundant number, since it is smaller than the sum of its proper divisors (34114421122384).

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

31013110111220 is a wasteful number, since it uses less digits than its factorization.

31013110111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550655505570 (or 1550655505568 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 31013110111220 its reverse (2211101131013), we get a palindrome (33224211242233).

The spelling of 31013110111220 in words is "thirty-one trillion, thirteen billion, one hundred ten million, one hundred eleven thousand, two hundred twenty".