121012101979 has 2 divisors, whose sum is σ = 121012101980. Its totient is φ = 121012101978.

The previous prime is 121012101967. The next prime is 121012102007. The reversal of 121012101979 is 979101210121.

It is a weak prime.

It is an emirp because it is prime and its reverse (979101210121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121012101979 - 2⁹ = 121012101467 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012101919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506050989 + 60506050990.

It is an arithmetic number, because the mean of its divisors is an integer number (60506050990).

Almost surely, 2^121012101979 is an apocalyptic number.

121012101979 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012101979 is an equidigital number, since it uses as much as digits as its factorization.

121012101979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 121012101979 in words is "one hundred twenty-one billion, twelve million, one hundred one thousand, nine hundred seventy-nine".