121001102019979 has 2 divisors, whose sum is σ = 121001102019980. Its totient is φ = 121001102019978.

The previous prime is 121001102019937. The next prime is 121001102020063. The reversal of 121001102019979 is 979910201100121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121001102019979 - 2¹⁷ = 121001101888907 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001172019979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500551009989 + 60500551009990.

It is an arithmetic number, because the mean of its divisors is an integer number (60500551009990).

Almost surely, 2^{121001102019979} is an apocalyptic number.

121001102019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001102019979 is an equidigital number, since it uses as much as digits as its factorization.

121001102019979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 43.

The spelling of 121001102019979 in words is "one hundred twenty-one trillion, one billion, one hundred two million, nineteen thousand, nine hundred seventy-nine".