21132103302991 has 2 divisors, whose sum is σ = 21132103302992. Its totient is φ = 21132103302990.

The previous prime is 21132103302983. The next prime is 21132103302997. The reversal of 21132103302991 is 19920330123112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21132103302991 - 2³ = 21132103302983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21132103302991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132103302997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566051651495 + 10566051651496.

It is an arithmetic number, because the mean of its divisors is an integer number (10566051651496).

Almost surely, 2^{21132103302991} is an apocalyptic number.

21132103302991 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132103302991 is an equidigital number, since it uses as much as digits as its factorization.

21132103302991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The spelling of 21132103302991 in words is "twenty-one trillion, one hundred thirty-two billion, one hundred three million, three hundred two thousand, nine hundred ninety-one".