12112112212 has 6 divisors (see below), whose sum is σ = 21196196378. Its totient is φ = 6056056104.

The previous prime is 12112112209. The next prime is 12112112219. The reversal of 12112112212 is 21221121121.

It can be written as a sum of positive squares in only one way, i.e., 6876721476 + 5235390736 = 82926^2 + 72356^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112112219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1514014023 + ... + 1514014030.

Almost surely, 2^12112112212 is an apocalyptic number.

It is an amenable number.

12112112212 is a deficient number, since it is larger than the sum of its proper divisors (9084084166).

12112112212 is a wasteful number, since it uses less digits than its factorization.

12112112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028028057 (or 3028028055 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 12112112212 its reverse (21221121121), we get a palindrome (33333233333).

The spelling of 12112112212 in words is "twelve billion, one hundred twelve million, one hundred twelve thousand, two hundred twelve".