12220222 has 16 divisors (see below), whose sum is σ = 21860352. Its totient is φ = 5009400.

The previous prime is 12220217. The next prime is 12220237. The reversal of 12220222 is 22202221.

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, 18654 + ... + 19297.

It is an arithmetic number, because the mean of its divisors is an integer number (1366272).

Almost surely, 2^12220222 is an apocalyptic number.

12220222 is a deficient number, since it is larger than the sum of its proper divisors (9640130).

12220222 is a wasteful number, since it uses less digits than its factorization.

12220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37983.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12220222 is about 3495.7434116365. The cubic root of 12220222 is about 230.3348745129.

Adding to 12220222 its reverse (22202221), we get a palindrome (34422443).

The spelling of 12220222 in words is "twelve million, two hundred twenty thousand, two hundred twenty-two".