121907911 has 2 divisors, whose sum is σ = 121907912. Its totient is φ = 121907910.

The previous prime is 121907879. The next prime is 121907927. The reversal of 121907911 is 119709121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121907911 - 2⁵ = 121907879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121907941) 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, 60953955 + 60953956.

It is an arithmetic number, because the mean of its divisors is an integer number (60953956).

Almost surely, 2^121907911 is an apocalyptic number.

121907911 is a deficient number, since it is larger than the sum of its proper divisors (1).

121907911 is an equidigital number, since it uses as much as digits as its factorization.

121907911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 121907911 is about 11041.1915570739. The cubic root of 121907911 is about 495.8427449257.

The spelling of 121907911 in words is "one hundred twenty-one million, nine hundred seven thousand, nine hundred eleven".