12011156 has 6 divisors (see below), whose sum is σ = 21019530. Its totient is φ = 6005576.

The previous prime is 12011149. The next prime is 12011171. The reversal of 12011156 is 65111021.

12011156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11424400 + 586756 = 3380^2 + 766^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1501391 + ... + 1501398.

It is an arithmetic number, because the mean of its divisors is an integer number (3503255).

Almost surely, 2^12011156 is an apocalyptic number.

It is an amenable number.

12011156 is a deficient number, since it is larger than the sum of its proper divisors (9008374).

12011156 is a wasteful number, since it uses less digits than its factorization.

12011156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002793 (or 3002791 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 12011156 is about 3465.7114709681. The cubic root of 12011156 is about 229.0137733813.

Adding to 12011156 its reverse (65111021), we get a palindrome (77122177).

It can be divided in two parts, 12011 and 156, that added together give a cube (12167 = 23³).

The spelling of 12011156 in words is "twelve million, eleven thousand, one hundred fifty-six".