12621222 has 12 divisors (see below), whose sum is σ = 27346020. Its totient is φ = 4207068.

The previous prime is 12621197. The next prime is 12621241. The reversal of 12621222 is 22212621.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 701179 = 12621222 / (1 + 2 + 6 + 2 + 1 + 2 + 2 + 2).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12621195 and 12621204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 350572 + ... + 350607.

It is an arithmetic number, because the mean of its divisors is an integer number (2278835).

Almost surely, 2^12621222 is an apocalyptic number.

12621222 is an abundant number, since it is smaller than the sum of its proper divisors (14724798).

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

12621222 is a wasteful number, since it uses less digits than its factorization.

12621222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701187 (or 701184 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 12621222 is about 3552.6359228044. The cubic root of 12621222 is about 232.8272464302.

Adding to 12621222 its reverse (22212621), we get a palindrome (34833843).

The spelling of 12621222 in words is "twelve million, six hundred twenty-one thousand, two hundred twenty-two".