12212321112 has 48 divisors (see below), whose sum is σ = 33080640840. Its totient is φ = 4070083968.

The previous prime is 12212321111. The next prime is 12212321113. The reversal of 12212321112 is 21112321221.

It is an interprime number because it is at equal distance from previous prime (12212321111) and next prime (12212321113).

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 not an unprimeable number, because it can be changed into a prime (12212321111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 587163 + ... + 607605.

Almost surely, 2^12212321112 is an apocalyptic number.

12212321112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12212321112 is an abundant number, since it is smaller than the sum of its proper divisors (20868319728).

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

12212321112 is a wasteful number, since it uses less digits than its factorization.

12212321112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28752 (or 28745 counting only the distinct ones).

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

Adding to 12212321112 its reverse (21112321221), we get a palindrome (33324642333).

The spelling of 12212321112 in words is "twelve billion, two hundred twelve million, three hundred twenty-one thousand, one hundred twelve".