2131210897 has 2 divisors, whose sum is σ = 2131210898. Its totient is φ = 2131210896.

The previous prime is 2131210891. The next prime is 2131210901. The reversal of 2131210897 is 7980121312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2127146641 + 4064256 = 46121^2 + 2016^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131210897 - 2²⁷ = 1996993169 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131210891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065605448 + 1065605449.

It is an arithmetic number, because the mean of its divisors is an integer number (1065605449).

Almost surely, 2^2131210897 is an apocalyptic number.

It is an amenable number.

2131210897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131210897 is an equidigital number, since it uses as much as digits as its factorization.

2131210897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 2131210897 is about 46165.0397703717. The cubic root of 2131210897 is about 1286.8921232868.

The spelling of 2131210897 in words is "two billion, one hundred thirty-one million, two hundred ten thousand, eight hundred ninety-seven".