11520121 has 4 divisors (see below), whose sum is σ = 11542672. Its totient is φ = 11497572.

The previous prime is 11520083. The next prime is 11520191. The reversal of 11520121 is 12102511.

11520121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11520121 - 2⁹ = 11519609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11520191) 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, 10491 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (2885668).

Almost surely, 2^11520121 is an apocalyptic number.

It is an amenable number.

11520121 is a deficient number, since it is larger than the sum of its proper divisors (22551).

11520121 is an equidigital number, since it uses as much as digits as its factorization.

11520121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22550.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 11520121 is about 3394.1303746321. The cubic root of 11520121 is about 225.8494376603.

Adding to 11520121 its reverse (12102511), we get a palindrome (23622632).

The spelling of 11520121 in words is "eleven million, five hundred twenty thousand, one hundred twenty-one".