122021211999979 has 2 divisors, whose sum is σ = 122021211999980. Its totient is φ = 122021211999978.

The previous prime is 122021211999959. The next prime is 122021212000033. The reversal of 122021211999979 is 979999112120221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122021211999979 - 2¹⁵ = 122021211967211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122021211999979.

It is not a weakly prime, because it can be changed into another prime (122021211999949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61010605999989 + 61010605999990.

It is an arithmetic number, because the mean of its divisors is an integer number (61010605999990).

Almost surely, 2^{122021211999979} is an apocalyptic number.

122021211999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

122021211999979 is an equidigital number, since it uses as much as digits as its factorization.

122021211999979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6613488, while the sum is 64.

The spelling of 122021211999979 in words is "one hundred twenty-two trillion, twenty-one billion, two hundred eleven million, nine hundred ninety-nine thousand, nine hundred seventy-nine".