11203121 has 8 divisors (see below), whose sum is σ = 11614464. Its totient is φ = 10794960.

The previous prime is 11203117. The next prime is 11203123. The reversal of 11203121 is 12130211.

11203121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11203121 - 2² = 11203117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11203123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8135 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (1451808).

Almost surely, 2^11203121 is an apocalyptic number.

It is an amenable number.

11203121 is a deficient number, since it is larger than the sum of its proper divisors (411343).

11203121 is a wasteful number, since it uses less digits than its factorization.

11203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 11203121 is about 3347.1063622180. The cubic root of 11203121 is about 223.7585687968.

Adding to 11203121 its reverse (12130211), we get a palindrome (23333332).

The spelling of 11203121 in words is "eleven million, two hundred three thousand, one hundred twenty-one".