12212146 has 16 divisors (see below), whose sum is σ = 18922176. Its totient is φ = 5906736.

The previous prime is 12212143. The next prime is 12212147. The reversal of 12212146 is 64121221.

It is not an unprimeable number, because it can be changed into a prime (12212141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16435 + ... + 17161.

It is an arithmetic number, because the mean of its divisors is an integer number (1182636).

Almost surely, 2^12212146 is an apocalyptic number.

12212146 is a deficient number, since it is larger than the sum of its proper divisors (6710030).

12212146 is a wasteful number, since it uses less digits than its factorization.

12212146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993.

The product of its digits is 192, while the sum is 19.

The square root of 12212146 is about 3494.5881016223. The cubic root of 12212146 is about 230.2841227241.

Adding to 12212146 its reverse (64121221), we get a palindrome (76333367).

The spelling of 12212146 in words is "twelve million, two hundred twelve thousand, one hundred forty-six".