12921222 has 16 divisors (see below), whose sum is σ = 25888752. Its totient is φ = 4299360.

The previous prime is 12921217. The next prime is 12921263. The reversal of 12921222 is 22212921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2472 + ... + 5652.

It is an arithmetic number, because the mean of its divisors is an integer number (1618047).

Almost surely, 2^12921222 is an apocalyptic number.

12921222 is an abundant number, since it is smaller than the sum of its proper divisors (12967530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12921222 is a wasteful number, since it uses less digits than its factorization.

12921222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863.

The product of its digits is 288, while the sum is 21.

The square root of 12921222 is about 3594.6101318502. The cubic root of 12921222 is about 234.6575485904.

The spelling of 12921222 in words is "twelve million, nine hundred twenty-one thousand, two hundred twenty-two".