121115995199 has 2 divisors, whose sum is σ = 121115995200. Its totient is φ = 121115995198.

The previous prime is 121115995153. The next prime is 121115995201. The reversal of 121115995199 is 991599511121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121115995199 is a prime.

Together with 121115995201, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121115995199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121115995139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60557997599 + 60557997600.

It is an arithmetic number, because the mean of its divisors is an integer number (60557997600).

Almost surely, 2^121115995199 is an apocalyptic number.

121115995199 is a deficient number, since it is larger than the sum of its proper divisors (1).

121115995199 is an equidigital number, since it uses as much as digits as its factorization.

121115995199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 328050, while the sum is 53.

The spelling of 121115995199 in words is "one hundred twenty-one billion, one hundred fifteen million, nine hundred ninety-five thousand, one hundred ninety-nine".