11889121 has 2 divisors, whose sum is σ = 11889122. Its totient is φ = 11889120.

The previous prime is 11889107. The next prime is 11889179. The reversal of 11889121 is 12198811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 192721 = 3420^2 + 439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11889121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11889181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5944560 + 5944561.

It is an arithmetic number, because the mean of its divisors is an integer number (5944561).

Almost surely, 2^11889121 is an apocalyptic number.

It is an amenable number.

11889121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11889121 is an equidigital number, since it uses as much as digits as its factorization.

11889121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 31.

The square root of 11889121 is about 3448.0604693073. The cubic root of 11889121 is about 228.2355278749.

The spelling of 11889121 in words is "eleven million, eight hundred eighty-nine thousand, one hundred twenty-one".