921120911111 has 2 divisors, whose sum is σ = 921120911112. Its totient is φ = 921120911110.

The previous prime is 921120911071. The next prime is 921120911251. The reversal of 921120911111 is 111119021129.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 921120911111 - 2³⁰ = 920047169287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921120911611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460560455555 + 460560455556.

It is an arithmetic number, because the mean of its divisors is an integer number (460560455556).

Almost surely, 2^921120911111 is an apocalyptic number.

921120911111 is a deficient number, since it is larger than the sum of its proper divisors (1).

921120911111 is an equidigital number, since it uses as much as digits as its factorization.

921120911111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 29.

The spelling of 921120911111 in words is "nine hundred twenty-one billion, one hundred twenty million, nine hundred eleven thousand, one hundred eleven".