12132112212 has 72 divisors (see below), whose sum is σ = 33623553600. Its totient is φ = 3657899520.

The previous prime is 12132112193. The next prime is 12132112231. The reversal of 12132112212 is 21221123121.

12132112212 is a `hidden beast` number, since 121 + 321 + 1 + 221 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (12132112193) and next prime (12132112231).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1828 + ... + 155780.

It is an arithmetic number, because the mean of its divisors is an integer number (466993800).

Almost surely, 2^12132112212 is an apocalyptic number.

12132112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12132112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16811776800).

12132112212 is an abundant number, since it is smaller than the sum of its proper divisors (21491441388).

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

12132112212 is a wasteful number, since it uses less digits than its factorization.

12132112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154173 (or 154168 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 12132112212 its reverse (21221123121), we get a palindrome (33353235333).

The spelling of 12132112212 in words is "twelve billion, one hundred thirty-two million, one hundred twelve thousand, two hundred twelve".