11499221 has 4 divisors (see below), whose sum is σ = 11510700. Its totient is φ = 11487744.

The previous prime is 11499209. The next prime is 11499227. The reversal of 11499221 is 12299411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 376996 + 11122225 = 614^2 + 3335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11499221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11499227) 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, 4076 + ... + 6293.

It is an arithmetic number, because the mean of its divisors is an integer number (2877675).

Almost surely, 2^11499221 is an apocalyptic number.

It is an amenable number.

11499221 is a deficient number, since it is larger than the sum of its proper divisors (11479).

11499221 is a wasteful number, since it uses less digits than its factorization.

11499221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11478.

The product of its digits is 1296, while the sum is 29.

The square root of 11499221 is about 3391.0501323336. The cubic root of 11499221 is about 225.7127750145.

The spelling of 11499221 in words is "eleven million, four hundred ninety-nine thousand, two hundred twenty-one".