12221379 has 12 divisors (see below), whose sum is σ = 17877600. Its totient is φ = 8043984.

The previous prime is 12221371. The next prime is 12221393. The reversal of 12221379 is 97312221.

It is not a de Polignac number, because 12221379 - 2³ = 12221371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7884 + ... + 9305.

It is an arithmetic number, because the mean of its divisors is an integer number (1489800).

Almost surely, 2^12221379 is an apocalyptic number.

12221379 is a deficient number, since it is larger than the sum of its proper divisors (5656221).

12221379 is a wasteful number, since it uses less digits than its factorization.

12221379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17274 (or 17271 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12221379 is about 3495.9088946939. The cubic root of 12221379 is about 230.3421435854.

It can be divided in two parts, 1222 and 1379, that added together give a square (2601 = 51²).

The spelling of 12221379 in words is "twelve million, two hundred twenty-one thousand, three hundred seventy-nine".