12011139 has 32 divisors (see below), whose sum is σ = 20567040. Its totient is φ = 6785856.

The previous prime is 12011123. The next prime is 12011143. The reversal of 12011139 is 93111021.

12011139 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12011139 - 2⁴ = 12011123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19159 + ... + 19775.

It is an arithmetic number, because the mean of its divisors is an integer number (642720).

Almost surely, 2^12011139 is an apocalyptic number.

12011139 is a deficient number, since it is larger than the sum of its proper divisors (8555901).

12011139 is a wasteful number, since it uses less digits than its factorization.

12011139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 12011139 is about 3465.7090183684. The cubic root of 12011139 is about 229.0136653363.

The spelling of 12011139 in words is "twelve million, eleven thousand, one hundred thirty-nine".