11868121 has 4 divisors (see below), whose sum is σ = 12030772. Its totient is φ = 11705472.

The previous prime is 11868113. The next prime is 11868139. The reversal of 11868121 is 12186811.

11868121 = T₃₂₈ + T₃₂₉ + ... + T₄₇₃.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3370896 + 8497225 = 1836^2 + 2915^2 .

It is a cyclic number.

It is not a de Polignac number, because 11868121 - 2³ = 11868113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11868121.

It is not an unprimeable number, because it can be changed into a prime (11868151) 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, 81216 + ... + 81361.

It is an arithmetic number, because the mean of its divisors is an integer number (3007693).

Almost surely, 2^11868121 is an apocalyptic number.

It is an amenable number.

11868121 is a deficient number, since it is larger than the sum of its proper divisors (162651).

11868121 is an equidigital number, since it uses as much as digits as its factorization.

11868121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162650.

The product of its digits is 768, while the sum is 28.

The square root of 11868121 is about 3445.0139332084. The cubic root of 11868121 is about 228.1010696359.

The spelling of 11868121 in words is "eleven million, eight hundred sixty-eight thousand, one hundred twenty-one".