12000020001979 has 2 divisors, whose sum is σ = 12000020001980. Its totient is φ = 12000020001978.

The previous prime is 12000020001973. The next prime is 12000020002073. The reversal of 12000020001979 is 97910002000021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12000020001979 - 2²¹ = 12000017904827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12000020001979.

It is not a weakly prime, because it can be changed into another prime (12000020001973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000010000989 + 6000010000990.

It is an arithmetic number, because the mean of its divisors is an integer number (6000010000990).

Almost surely, 2^{12000020001979} is an apocalyptic number.

12000020001979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000020001979 is an equidigital number, since it uses as much as digits as its factorization.

12000020001979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 12000020001979 in words is "twelve trillion, twenty million, one thousand, nine hundred seventy-nine".