21213442260979 has 2 divisors, whose sum is σ = 21213442260980. Its totient is φ = 21213442260978.

The previous prime is 21213442260961. The next prime is 21213442261069. The reversal of 21213442260979 is 97906224431212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21213442260979 - 2²⁹ = 21212905390067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21213442260779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606721130489 + 10606721130490.

It is an arithmetic number, because the mean of its divisors is an integer number (10606721130490).

Almost surely, 2^{21213442260979} is an apocalyptic number.

21213442260979 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213442260979 is an equidigital number, since it uses as much as digits as its factorization.

21213442260979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 21213442260979 in words is "twenty-one trillion, two hundred thirteen billion, four hundred forty-two million, two hundred sixty thousand, nine hundred seventy-nine".