11603121 has 4 divisors (see below), whose sum is σ = 15470832. Its totient is φ = 7735412.

The previous prime is 11603113. The next prime is 11603143. The reversal of 11603121 is 12130611.

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 11603121 - 2³ = 11603113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11603121.

It is not an unprimeable number, because it can be changed into a prime (11603171) 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, 1933851 + ... + 1933856.

It is an arithmetic number, because the mean of its divisors is an integer number (3867708).

Almost surely, 2^11603121 is an apocalyptic number.

It is an amenable number.

11603121 is a deficient number, since it is larger than the sum of its proper divisors (3867711).

11603121 is an equidigital number, since it uses as much as digits as its factorization.

11603121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867710.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 11603121 is about 3406.3354209473. The cubic root of 11603121 is about 226.3905391398.

Adding to 11603121 its reverse (12130611), we get a palindrome (23733732).

The spelling of 11603121 in words is "eleven million, six hundred three thousand, one hundred twenty-one".