916121111 has 2 divisors, whose sum is σ = 916121112. Its totient is φ = 916121110.

The previous prime is 916121099. The next prime is 916121113. The reversal of 916121111 is 111121619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 916121111 - 2⁶ = 916121047 is a prime.

Together with 916121113, 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 (916121113) 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, 458060555 + 458060556.

It is an arithmetic number, because the mean of its divisors is an integer number (458060556).

Almost surely, 2^916121111 is an apocalyptic number.

916121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

916121111 is an equidigital number, since it uses as much as digits as its factorization.

916121111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 23.

The square root of 916121111 is about 30267.4926447501. The cubic root of 916121111 is about 971.2200296629.

The spelling of 916121111 in words is "nine hundred sixteen million, one hundred twenty-one thousand, one hundred eleven".