121953911 has 2 divisors, whose sum is σ = 121953912. Its totient is φ = 121953910.

The previous prime is 121953883. The next prime is 121953917. The reversal of 121953911 is 119359121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121953911 - 2⁶ = 121953847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121953917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60976955 + 60976956.

It is an arithmetic number, because the mean of its divisors is an integer number (60976956).

Almost surely, 2^121953911 is an apocalyptic number.

121953911 is a deficient number, since it is larger than the sum of its proper divisors (1).

121953911 is an equidigital number, since it uses as much as digits as its factorization.

121953911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 32.

The square root of 121953911 is about 11043.2744691056. The cubic root of 121953911 is about 495.9051031922.

The spelling of 121953911 in words is "one hundred twenty-one million, nine hundred fifty-three thousand, nine hundred eleven".