21130310123297 has 2 divisors, whose sum is σ = 21130310123298. Its totient is φ = 21130310123296.

The previous prime is 21130310123257. The next prime is 21130310123339. The reversal of 21130310123297 is 79232101303112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20957021917456 + 173288205841 = 4577884^2 + 416279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130310123297 is a prime.

It is not a weakly prime, because it can be changed into another prime (21130310123207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565155061648 + 10565155061649.

It is an arithmetic number, because the mean of its divisors is an integer number (10565155061649).

Almost surely, 2^{21130310123297} is an apocalyptic number.

It is an amenable number.

21130310123297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130310123297 is an equidigital number, since it uses as much as digits as its factorization.

21130310123297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 21130310123297 in words is "twenty-one trillion, one hundred thirty billion, three hundred ten million, one hundred twenty-three thousand, two hundred ninety-seven".