21021010002079 has 2 divisors, whose sum is σ = 21021010002080. Its totient is φ = 21021010002078.

The previous prime is 21021010002061. The next prime is 21021010002211. The reversal of 21021010002079 is 97020001012012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021010002079 - 2⁹ = 21021010001567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021010002029) 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, 10510505001039 + 10510505001040.

It is an arithmetic number, because the mean of its divisors is an integer number (10510505001040).

Almost surely, 2^{21021010002079} is an apocalyptic number.

21021010002079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021010002079 is an equidigital number, since it uses as much as digits as its factorization.

21021010002079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 21021010002079 in words is "twenty-one trillion, twenty-one billion, ten million, two thousand, seventy-nine".