121124999 has 2 divisors, whose sum is σ = 121125000. Its totient is φ = 121124998.

The previous prime is 121124977. The next prime is 121125001. The reversal of 121124999 is 999421121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121124999 is a prime.

Together with 121125001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121124959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60562499 + 60562500.

It is an arithmetic number, because the mean of its divisors is an integer number (60562500).

Almost surely, 2^121124999 is an apocalyptic number.

121124999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121124999 is an equidigital number, since it uses as much as digits as its factorization.

121124999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 38.

The square root of 121124999 is about 11005.6803060965. The cubic root of 121124999 is about 494.7790041624.

The spelling of 121124999 in words is "one hundred twenty-one million, one hundred twenty-four thousand, nine hundred ninety-nine".