11107921 has 6 divisors (see below), whose sum is σ = 12209666. Its totient is φ = 10098000.

The previous prime is 11107897. The next prime is 11107927. The reversal of 11107921 is 12970111.

11107921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9217296 + 1890625 = 3036^2 + 1375^2 .

It is not a de Polignac number, because 11107921 - 2¹¹ = 11105873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11107892 and 11107901.

It is not an unprimeable number, because it can be changed into a prime (11107927) 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 in 5 ways as a sum of consecutive naturals, for example, 45780 + ... + 46021.

Almost surely, 2^11107921 is an apocalyptic number.

11107921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11107921 is a deficient number, since it is larger than the sum of its proper divisors (1101745).

11107921 is an equidigital number, since it uses as much as digits as its factorization.

11107921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91823 (or 91812 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 11107921 is about 3332.8547823150. The cubic root of 11107921 is about 223.1229589950.

The spelling of 11107921 in words is "eleven million, one hundred seven thousand, nine hundred twenty-one".