12221392 has 20 divisors (see below), whose sum is σ = 23748480. Its totient is φ = 6092768.

The previous prime is 12221371. The next prime is 12221393. The reversal of 12221392 is 29312221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221393) 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, 5793 + ... + 7615.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^12221392 is an apocalyptic number.

It is an amenable number.

12221392 is a deficient number, since it is larger than the sum of its proper divisors (11527088).

12221392 is a wasteful number, since it uses less digits than its factorization.

12221392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250 (or 2244 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 12221392 is about 3495.9107540096. The cubic root of 12221392 is about 230.3422252578.

The spelling of 12221392 in words is "twelve million, two hundred twenty-one thousand, three hundred ninety-two".