21132103302997 has 2 divisors, whose sum is σ = 21132103302998. Its totient is φ = 21132103302996.

The previous prime is 21132103302991. The next prime is 21132103303007. The reversal of 21132103302997 is 79920330123112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11325742159876 + 9806361143121 = 3365374^2 + 3131511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132103302997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132103302991) 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, 10566051651498 + 10566051651499.

It is an arithmetic number, because the mean of its divisors is an integer number (10566051651499).

Almost surely, 2^{21132103302997} is an apocalyptic number.

It is an amenable number.

21132103302997 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132103302997 is an equidigital number, since it uses as much as digits as its factorization.

21132103302997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The spelling of 21132103302997 in words is "twenty-one trillion, one hundred thirty-two billion, one hundred three million, three hundred two thousand, nine hundred ninety-seven".