12118621 has 8 divisors (see below), whose sum is σ = 12426624. Its totient is φ = 11812800.

The previous prime is 12118619. The next prime is 12118627. The reversal of 12118621 is 12681121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12118621 - 2¹ = 12118619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12118592 and 12118601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18526 + ... + 19168.

It is an arithmetic number, because the mean of its divisors is an integer number (1553328).

Almost surely, 2^12118621 is an apocalyptic number.

It is an amenable number.

12118621 is a deficient number, since it is larger than the sum of its proper divisors (308003).

12118621 is an equidigital number, since it uses as much as digits as its factorization.

12118621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its digits is 192, while the sum is 22.

The square root of 12118621 is about 3481.1809777718. The cubic root of 12118621 is about 229.6947494372.

Adding to 12118621 its reverse (12681121), we get a palindrome (24799742).

Subtracting 12118621 from its reverse (12681121), we obtain a square (562500 = 750²).

The spelling of 12118621 in words is "twelve million, one hundred eighteen thousand, six hundred twenty-one".