12188011 has 4 divisors (see below), whose sum is σ = 13296024. Its totient is φ = 11080000.

The previous prime is 12188009. The next prime is 12188017. The reversal of 12188011 is 11088121.

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

It is a cyclic number.

It is not a de Polignac number, because 12188011 - 2¹ = 12188009 is a prime.

It is a super-2 number, since 2×12188011² = 297095224272242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12188017) 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, 553990 + ... + 554011.

It is an arithmetic number, because the mean of its divisors is an integer number (3324006).

Almost surely, 2^12188011 is an apocalyptic number.

12188011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12188011 is a deficient number, since it is larger than the sum of its proper divisors (1108013).

12188011 is a wasteful number, since it uses less digits than its factorization.

12188011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108012.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 12188011 is about 3491.1331971152. The cubic root of 12188011 is about 230.1323183180.

It can be divided in two parts, 1218 and 8011, that added together give a palindrome (9229).

The spelling of 12188011 in words is "twelve million, one hundred eighty-eight thousand, eleven".