120492978209 has 2 divisors, whose sum is σ = 120492978210. Its totient is φ = 120492978208.

The previous prime is 120492978191. The next prime is 120492978217. The reversal of 120492978209 is 902879294021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100093140625 + 20399837584 = 316375^2 + 142828^2 .

It is a cyclic number.

It is not a de Polignac number, because 120492978209 - 2¹² = 120492974113 is a prime.

It is not a weakly prime, because it can be changed into another prime (120492978409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60246489104 + 60246489105.

It is an arithmetic number, because the mean of its divisors is an integer number (60246489105).

Almost surely, 2^120492978209 is an apocalyptic number.

It is an amenable number.

120492978209 is a deficient number, since it is larger than the sum of its proper divisors (1).

120492978209 is an equidigital number, since it uses as much as digits as its factorization.

120492978209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 120492978209 in words is "one hundred twenty billion, four hundred ninety-two million, nine hundred seventy-eight thousand, two hundred nine".