31020120022031 has 6 divisors (see below), whose sum is σ = 36084629413440. Its totient is φ = 26588674304556.

The previous prime is 31020120021953. The next prime is 31020120022033. The reversal of 31020120022031 is 13022002102013.

It is not a de Polignac number, because 31020120022031 - 2¹⁴ = 31020120005647 is a prime.

It is a super-2 number, since 2×31020120022031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020120022033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316531836911 + ... + 316531837008.

It is an arithmetic number, because the mean of its divisors is an integer number (6014104902240).

Almost surely, 2^{31020120022031} is an apocalyptic number.

31020120022031 is a deficient number, since it is larger than the sum of its proper divisors (5064509391409).

31020120022031 is an equidigital number, since it uses as much as digits as its factorization.

31020120022031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633063673933 (or 633063673926 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31020120022031 its reverse (13022002102013), we get a palindrome (44042122124044).

The spelling of 31020120022031 in words is "thirty-one trillion, twenty billion, one hundred twenty million, twenty-two thousand, thirty-one".