31020124031 has 16 divisors (see below), whose sum is σ = 34470944928. Its totient is φ = 27731596800.

The previous prime is 31020123997. The next prime is 31020124039. The reversal of 31020124031 is 13042102013.

It is a cyclic number.

It is not a de Polignac number, because 31020124031 - 2³⁴ = 13840254847 is a prime.

It is a super-2 number, since 2×31020124031² (a number of 22 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 (31020124039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139385 + ... + 285426.

It is an arithmetic number, because the mean of its divisors is an integer number (2154434058).

Almost surely, 2^31020124031 is an apocalyptic number.

31020124031 is a deficient number, since it is larger than the sum of its proper divisors (3450820897).

31020124031 is a wasteful number, since it uses less digits than its factorization.

31020124031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425002.

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

Adding to 31020124031 its reverse (13042102013), we get a palindrome (44062226044).

The spelling of 31020124031 in words is "thirty-one billion, twenty million, one hundred twenty-four thousand, thirty-one".