3031021331981 has 2 divisors, whose sum is σ = 3031021331982. Its totient is φ = 3031021331980.

The previous prime is 3031021331969. The next prime is 3031021332037. The reversal of 3031021331981 is 1891331201303.

3031021331981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3005857855081 + 25163476900 = 1733741^2 + 158630^2 .

It is a cyclic number.

It is not a de Polignac number, because 3031021331981 - 2²⁶ = 3030954223117 is a prime.

It is a super-2 number, since 2×3031021331981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3031021331881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515510665990 + 1515510665991.

It is an arithmetic number, because the mean of its divisors is an integer number (1515510665991).

Almost surely, 2^{3031021331981} is an apocalyptic number.

It is an amenable number.

3031021331981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3031021331981 is an equidigital number, since it uses as much as digits as its factorization.

3031021331981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 3031021331981 in words is "three trillion, thirty-one billion, twenty-one million, three hundred thirty-one thousand, nine hundred eighty-one".