121390799 has 2 divisors, whose sum is σ = 121390800. Its totient is φ = 121390798.

The previous prime is 121390783. The next prime is 121390811. The reversal of 121390799 is 997093121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121390799 - 2⁴ = 121390783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121390739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60695399 + 60695400.

It is an arithmetic number, because the mean of its divisors is an integer number (60695400).

Almost surely, 2^121390799 is an apocalyptic number.

121390799 is a deficient number, since it is larger than the sum of its proper divisors (1).

121390799 is an equidigital number, since it uses as much as digits as its factorization.

121390799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 121390799 is about 11017.7492710626. The cubic root of 121390799 is about 495.1406585950.

The spelling of 121390799 in words is "one hundred twenty-one million, three hundred ninety thousand, seven hundred ninety-nine".