12212123232 has 96 divisors (see below), whose sum is σ = 34248009600. Its totient is φ = 3798862848.

The previous prime is 12212123197. The next prime is 12212123279. The reversal of 12212123232 is 23232121221.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a junction number, because it is equal to n+sod(n) for n = 12212123199 and 12212123208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72244 + ... + 172172.

It is an arithmetic number, because the mean of its divisors is an integer number (356750100).

Almost surely, 2^12212123232 is an apocalyptic number.

12212123232 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 12212123232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17124004800).

12212123232 is an abundant number, since it is smaller than the sum of its proper divisors (22035886368).

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

12212123232 is a wasteful number, since it uses less digits than its factorization.

12212123232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100028 (or 100020 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 12212123232 its reverse (23232121221), we get a palindrome (35444244453).

The spelling of 12212123232 in words is "twelve billion, two hundred twelve million, one hundred twenty-three thousand, two hundred thirty-two".