12220331 has 8 divisors (see below), whose sum is σ = 13133520. Its totient is φ = 11328768.

The previous prime is 12220301. The next prime is 12220333. The reversal of 12220331 is 13302221.

12220331 = 233² + 234² + ... + 366².

It is a happy number.

12220331 is nontrivially palindromic in base 16.

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 12220331 - 2⁶ = 12220267 is a prime.

It is a super-2 number, since 2×12220331² = 298672979499122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12220333) 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, 4226 + ... + 6503.

It is an arithmetic number, because the mean of its divisors is an integer number (1641690).

Almost surely, 2^12220331 is an apocalyptic number.

12220331 is a deficient number, since it is larger than the sum of its proper divisors (913189).

12220331 is a wasteful number, since it uses less digits than its factorization.

12220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10813.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12220331 is about 3495.7590019908. The cubic root of 12220331 is about 230.3355593457.

Adding to 12220331 its reverse (13302221), we get a palindrome (25522552).

The spelling of 12220331 in words is "twelve million, two hundred twenty thousand, three hundred thirty-one".