21202122202879 has 2 divisors, whose sum is σ = 21202122202880. Its totient is φ = 21202122202878.

The previous prime is 21202122202873. The next prime is 21202122202981. The reversal of 21202122202879 is 97820222120212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202122202879 - 2³ = 21202122202871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202122202871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601061101439 + 10601061101440.

It is an arithmetic number, because the mean of its divisors is an integer number (10601061101440).

Almost surely, 2^{21202122202879} is an apocalyptic number.

21202122202879 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202122202879 is an equidigital number, since it uses as much as digits as its factorization.

21202122202879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 21202122202879 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two million, two hundred two thousand, eight hundred seventy-nine".