31038115480021 has 16 divisors (see below), whose sum is σ = 33438029587200. Its totient is φ = 28639969420608.

The previous prime is 31038115479983. The next prime is 31038115480121. The reversal of 31038115480021 is 12008451183013.

It is not a de Polignac number, because 31038115480021 - 2⁷ = 31038115479893 is a prime.

It is a super-2 number, since 2×31038115480021² (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 (31038115480121) 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, 1005788890 + ... + 1005819748.

It is an arithmetic number, because the mean of its divisors is an integer number (2089876849200).

Almost surely, 2^{31038115480021} is an apocalyptic number.

It is an amenable number.

31038115480021 is a deficient number, since it is larger than the sum of its proper divisors (2399914107179).

31038115480021 is a wasteful number, since it uses less digits than its factorization.

31038115480021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56988.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 31038115480021 in words is "thirty-one trillion, thirty-eight billion, one hundred fifteen million, four hundred eighty thousand, twenty-one".