31013301232220 has 48 divisors (see below), whose sum is σ = 66665078349408. Its totient is φ = 12112725999360.

The previous prime is 31013301232141. The next prime is 31013301232231. The reversal of 31013301232220 is 2223210331013.

It is a super-2 number, since 2×31013301232220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3554711 + ... + 8640750.

It is an arithmetic number, because the mean of its divisors is an integer number (1388855798946).

Almost surely, 2^{31013301232220} is an apocalyptic number.

It is an amenable number.

31013301232220 is an abundant number, since it is smaller than the sum of its proper divisors (35651777117188).

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

31013301232220 is a wasteful number, since it uses less digits than its factorization.

31013301232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12198470 (or 12198468 counting only the distinct ones).

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

Adding to 31013301232220 its reverse (2223210331013), we get a palindrome (33236511563233).

The spelling of 31013301232220 in words is "thirty-one trillion, thirteen billion, three hundred one million, two hundred thirty-two thousand, two hundred twenty".