21002000131379 has 2 divisors, whose sum is σ = 21002000131380. Its totient is φ = 21002000131378.

The previous prime is 21002000131303. The next prime is 21002000131393. The reversal of 21002000131379 is 97313100020012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002000131379 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002002131379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501000065689 + 10501000065690.

It is an arithmetic number, because the mean of its divisors is an integer number (10501000065690).

Almost surely, 2^{21002000131379} is an apocalyptic number.

21002000131379 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002000131379 is an equidigital number, since it uses as much as digits as its factorization.

21002000131379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The spelling of 21002000131379 in words is "twenty-one trillion, two billion, one hundred thirty-one thousand, three hundred seventy-nine".