2121012019979 has 2 divisors, whose sum is σ = 2121012019980. Its totient is φ = 2121012019978.

The previous prime is 2121012019961. The next prime is 2121012020041. The reversal of 2121012019979 is 9799102101212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121012019979 - 2²⁴ = 2120995242763 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121012019879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060506009989 + 1060506009990.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506009990).

Almost surely, 2^{2121012019979} is an apocalyptic number.

2121012019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012019979 is an equidigital number, since it uses as much as digits as its factorization.

2121012019979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 2121012019979 in words is "two trillion, one hundred twenty-one billion, twelve million, nineteen thousand, nine hundred seventy-nine".