120990117779 has 2 divisors, whose sum is σ = 120990117780. Its totient is φ = 120990117778.

The previous prime is 120990117763. The next prime is 120990117799. The reversal of 120990117779 is 977711099021.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (977711099021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120990117779 - 2⁴ = 120990117763 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120990117779.

It is not a weakly prime, because it can be changed into another prime (120990117719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60495058889 + 60495058890.

It is an arithmetic number, because the mean of its divisors is an integer number (60495058890).

Almost surely, 2^120990117779 is an apocalyptic number.

120990117779 is a deficient number, since it is larger than the sum of its proper divisors (1).

120990117779 is an equidigital number, since it uses as much as digits as its factorization.

120990117779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500094, while the sum is 53.

The spelling of 120990117779 in words is "one hundred twenty billion, nine hundred ninety million, one hundred seventeen thousand, seven hundred seventy-nine".