212211021199979 has 2 divisors, whose sum is σ = 212211021199980. Its totient is φ = 212211021199978.

The previous prime is 212211021199951. The next prime is 212211021200021. The reversal of 212211021199979 is 979991120112212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212211021199979 - 2⁴⁰ = 211111509572203 is a prime.

It is not a weakly prime, because it can be changed into another prime (212211021199949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105510599989 + 106105510599990.

It is an arithmetic number, because the mean of its divisors is an integer number (106105510599990).

Almost surely, 2^{212211021199979} is an apocalyptic number.

212211021199979 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211021199979 is an equidigital number, since it uses as much as digits as its factorization.

212211021199979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 56.

The spelling of 212211021199979 in words is "two hundred twelve trillion, two hundred eleven billion, twenty-one million, one hundred ninety-nine thousand, nine hundred seventy-nine".