11166258921 has 4 divisors (see below), whose sum is σ = 14888345232. Its totient is φ = 7444172612.

The previous prime is 11166258913. The next prime is 11166258947. The reversal of 11166258921 is 12985266111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11166258921 - 2³ = 11166258913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11166258721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861043151 + ... + 1861043156.

It is an arithmetic number, because the mean of its divisors is an integer number (3722086308).

Almost surely, 2^11166258921 is an apocalyptic number.

It is an amenable number.

11166258921 is a deficient number, since it is larger than the sum of its proper divisors (3722086311).

11166258921 is an equidigital number, since it uses as much as digits as its factorization.

11166258921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722086310.

The product of its digits is 51840, while the sum is 42.

The spelling of 11166258921 in words is "eleven billion, one hundred sixty-six million, two hundred fifty-eight thousand, nine hundred twenty-one".