2972981021 has 2 divisors, whose sum is σ = 2972981022. Its totient is φ = 2972981020.

The previous prime is 2972980987. The next prime is 2972981041. The reversal of 2972981021 is 1201892792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1620948121 + 1352032900 = 40261^2 + 36770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2972981021 - 2²⁶ = 2905872157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2972981021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2972981041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1486490510 + 1486490511.

It is an arithmetic number, because the mean of its divisors is an integer number (1486490511).

Almost surely, 2^2972981021 is an apocalyptic number.

It is an amenable number.

2972981021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2972981021 is an equidigital number, since it uses as much as digits as its factorization.

2972981021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 2972981021 is about 54525.0494818666. The cubic root of 2972981021 is about 1437.9067162805.

The spelling of 2972981021 in words is "two billion, nine hundred seventy-two million, nine hundred eighty-one thousand, twenty-one".