11664121 has 4 divisors (see below), whose sum is σ = 13330432. Its totient is φ = 9997812.

The previous prime is 11664089. The next prime is 11664181. The reversal of 11664121 is 12146611.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12146611 = 3307 ⋅3673.

It is a cyclic number.

It is not a de Polignac number, because 11664121 - 2⁵ = 11664089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11664092 and 11664101.

It is not an unprimeable number, because it can be changed into a prime (11664181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833145 + ... + 833158.

It is an arithmetic number, because the mean of its divisors is an integer number (3332608).

Almost surely, 2^11664121 is an apocalyptic number.

It is an amenable number.

11664121 is a deficient number, since it is larger than the sum of its proper divisors (1666311).

11664121 is an equidigital number, since it uses as much as digits as its factorization.

11664121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666310.

The product of its digits is 288, while the sum is 22.

The square root of 11664121 is about 3415.2775875469. The cubic root of 11664121 is about 226.7865731885.

It can be divided in two parts, 11664 and 121, that multiplied together give a square (1411344 = 1188²).

The spelling of 11664121 in words is "eleven million, six hundred sixty-four thousand, one hundred twenty-one".