21020013022079 has 2 divisors, whose sum is σ = 21020013022080. Its totient is φ = 21020013022078.

The previous prime is 21020013022007. The next prime is 21020013022153. The reversal of 21020013022079 is 97022031002012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020013022079 - 2⁸ = 21020013021823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020013012079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510006511039 + 10510006511040.

It is an arithmetic number, because the mean of its divisors is an integer number (10510006511040).

Almost surely, 2^{21020013022079} is an apocalyptic number.

21020013022079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020013022079 is an equidigital number, since it uses as much as digits as its factorization.

21020013022079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The spelling of 21020013022079 in words is "twenty-one trillion, twenty billion, thirteen million, twenty-two thousand, seventy-nine".