12188901 has 4 divisors (see below), whose sum is σ = 16251872. Its totient is φ = 8125932.

The previous prime is 12188863. The next prime is 12188927. The reversal of 12188901 is 10988121.

12188901 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12188901 - 2⁹ = 12188389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12188941) 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, 2031481 + ... + 2031486.

It is an arithmetic number, because the mean of its divisors is an integer number (4062968).

Almost surely, 2^12188901 is an apocalyptic number.

It is an amenable number.

12188901 is a deficient number, since it is larger than the sum of its proper divisors (4062971).

12188901 is an equidigital number, since it uses as much as digits as its factorization.

12188901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062970.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 12188901 is about 3491.2606605637. The cubic root of 12188901 is about 230.1379198002.

The spelling of 12188901 in words is "twelve million, one hundred eighty-eight thousand, nine hundred one".