11890121 has 8 divisors (see below), whose sum is σ = 12063744. Its totient is φ = 11718000.

The previous prime is 11890091. The next prime is 11890127. The reversal of 11890121 is 12109811.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11890121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11890127) 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, 31691 + ... + 32063.

It is an arithmetic number, because the mean of its divisors is an integer number (1507968).

Almost surely, 2^11890121 is an apocalyptic number.

It is an amenable number.

11890121 is a deficient number, since it is larger than the sum of its proper divisors (173623).

11890121 is a wasteful number, since it uses less digits than its factorization.

11890121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 11890121 is about 3448.2054753161. The cubic root of 11890121 is about 228.2419266975.

Adding to 11890121 its reverse (12109811), we get a palindrome (23999932).

The spelling of 11890121 in words is "eleven million, eight hundred ninety thousand, one hundred twenty-one".