2971012921 has 2 divisors, whose sum is σ = 2971012922. Its totient is φ = 2971012920.

The previous prime is 2971012907. The next prime is 2971012987. The reversal of 2971012921 is 1292101792.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1809566521 + 1161446400 = 42539^2 + 34080^2 .

It is a cyclic number.

It is not a de Polignac number, because 2971012921 - 2⁹ = 2971012409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2971052921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1485506460 + 1485506461.

It is an arithmetic number, because the mean of its divisors is an integer number (1485506461).

Almost surely, 2^2971012921 is an apocalyptic number.

It is an amenable number.

2971012921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2971012921 is an equidigital number, since it uses as much as digits as its factorization.

2971012921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 2971012921 is about 54506.9988258389. The cubic root of 2971012921 is about 1437.5893503227.

The spelling of 2971012921 in words is "two billion, nine hundred seventy-one million, twelve thousand, nine hundred twenty-one".