12122211212 has 12 divisors (see below), whose sum is σ = 21216116040. Its totient is φ = 6060463776.

The previous prime is 12122211187. The next prime is 12122211217. The reversal of 12122211212 is 21211222121.

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

It is not an unprimeable number, because it can be changed into a prime (12122211217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116633 + ... + 194544.

It is an arithmetic number, because the mean of its divisors is an integer number (1768009670).

Almost surely, 2^12122211212 is an apocalyptic number.

It is an amenable number.

12122211212 is a deficient number, since it is larger than the sum of its proper divisors (9093904828).

12122211212 is a wasteful number, since it uses less digits than its factorization.

12122211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320920 (or 320918 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 12122211212 its reverse (21211222121), we get a palindrome (33333433333).

The spelling of 12122211212 in words is "twelve billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twelve".