11550121 has 4 divisors (see below), whose sum is σ = 12600144. Its totient is φ = 10500100.

The previous prime is 11550113. The next prime is 11550137. The reversal of 11550121 is 12105511.

11550121 is digitally balanced in base 2 and base 3, because in such bases 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 11550121 - 2³ = 11550113 is a prime.

It is a super-2 number, since 2×11550121² = 266810590229282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11550095 and 11550104.

It is not an unprimeable number, because it can be changed into a prime (11550181) 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, 524995 + ... + 525016.

It is an arithmetic number, because the mean of its divisors is an integer number (3150036).

Almost surely, 2^11550121 is an apocalyptic number.

11550121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11550121 is a deficient number, since it is larger than the sum of its proper divisors (1050023).

11550121 is a wasteful number, since it uses less digits than its factorization.

11550121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050022.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 11550121 is about 3398.5468953657. The cubic root of 11550121 is about 226.0453155274.

Adding to 11550121 its reverse (12105511), we get a palindrome (23655632).

The spelling of 11550121 in words is "eleven million, five hundred fifty thousand, one hundred twenty-one".