12124181 has 4 divisors (see below), whose sum is σ = 12216864. Its totient is φ = 12031500.

The previous prime is 12124171. The next prime is 12124183. The reversal of 12124181 is 18142121.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12124181 is a prime.

It is a super-2 number, since 2×12124181² = 293991529841522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12124183) 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, 46145 + ... + 46406.

It is an arithmetic number, because the mean of its divisors is an integer number (3054216).

Almost surely, 2^12124181 is an apocalyptic number.

It is an amenable number.

12124181 is a deficient number, since it is larger than the sum of its proper divisors (92683).

12124181 is an equidigital number, since it uses as much as digits as its factorization.

12124181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92682.

The product of its digits is 128, while the sum is 20.

The square root of 12124181 is about 3481.9794657637. The cubic root of 12124181 is about 229.7298719028.

The spelling of 12124181 in words is "twelve million, one hundred twenty-four thousand, one hundred eighty-one".