21010333221079 has 2 divisors, whose sum is σ = 21010333221080. Its totient is φ = 21010333221078.

The previous prime is 21010333221071. The next prime is 21010333221161. The reversal of 21010333221079 is 97012233301012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010333221079 - 2³ = 21010333221071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010333221071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505166610539 + 10505166610540.

It is an arithmetic number, because the mean of its divisors is an integer number (10505166610540).

Almost surely, 2^{21010333221079} is an apocalyptic number.

21010333221079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010333221079 is an equidigital number, since it uses as much as digits as its factorization.

21010333221079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 21010333221079 in words is "twenty-one trillion, ten billion, three hundred thirty-three million, two hundred twenty-one thousand, seventy-nine".