12116221 has 8 divisors (see below), whose sum is σ = 13233024. Its totient is φ = 11025840.

The previous prime is 12116201. The next prime is 12116231. The reversal of 12116221 is 12261121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12116221 is a prime.

It is a super-2 number, since 2×12116221² = 293605622641682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12116195 and 12116204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12116201) 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, 5641 + ... + 7486.

It is an arithmetic number, because the mean of its divisors is an integer number (1654128).

Almost surely, 2^12116221 is an apocalyptic number.

It is an amenable number.

12116221 is a deficient number, since it is larger than the sum of its proper divisors (1116803).

12116221 is a wasteful number, since it uses less digits than its factorization.

12116221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13211.

The product of its digits is 48, while the sum is 16.

The square root of 12116221 is about 3480.8362500985. The cubic root of 12116221 is about 229.6795853413.

Adding to 12116221 its reverse (12261121), we get a palindrome (24377342).

The spelling of 12116221 in words is "twelve million, one hundred sixteen thousand, two hundred twenty-one".