31020231101 has 12 divisors (see below), whose sum is σ = 31381907700. Its totient is φ = 30662630400.

The previous prime is 31020231097. The next prime is 31020231103. The reversal of 31020231101 is 10113202013.

It can be written as a sum of positive squares in 6 ways, for example, as 11378488900 + 19641742201 = 106670^2 + 140149^2 .

It is not a de Polignac number, because 31020231101 - 2² = 31020231097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020231103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7230365 + ... + 7234653.

It is an arithmetic number, because the mean of its divisors is an integer number (2615158975).

Almost surely, 2^31020231101 is an apocalyptic number.

It is an amenable number.

31020231101 is a deficient number, since it is larger than the sum of its proper divisors (361676599).

31020231101 is an equidigital number, since it uses as much as digits as its factorization.

31020231101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200 (or 5099 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31020231101 its reverse (10113202013), we get a palindrome (41133433114).

The spelling of 31020231101 in words is "thirty-one billion, twenty million, two hundred thirty-one thousand, one hundred one".