21212002110979 has 2 divisors, whose sum is σ = 21212002110980. Its totient is φ = 21212002110978.

The previous prime is 21212002110973. The next prime is 21212002110983. The reversal of 21212002110979 is 97901120021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212002110979 - 2³¹ = 21209854627331 is a prime.

It is not a weakly prime, because it can be changed into another prime (21212002110973) 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, 10606001055489 + 10606001055490.

It is an arithmetic number, because the mean of its divisors is an integer number (10606001055490).

Almost surely, 2^{21212002110979} is an apocalyptic number.

21212002110979 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212002110979 is an equidigital number, since it uses as much as digits as its factorization.

21212002110979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 21212002110979 in words is "twenty-one trillion, two hundred twelve billion, two million, one hundred ten thousand, nine hundred seventy-nine".