12031432220 has 96 divisors (see below), whose sum is σ = 26215358400. Its totient is φ = 4635961344.

The previous prime is 12031432213. The next prime is 12031432241. The reversal of 12031432220 is 2223413021.

It is a super-2 number, since 2×12031432220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12031432192 and 12031432201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16969226 + ... + 16969934.

It is an arithmetic number, because the mean of its divisors is an integer number (273076650).

Almost surely, 2^12031432220 is an apocalyptic number.

12031432220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12031432220 is an abundant number, since it is smaller than the sum of its proper divisors (14183926180).

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

12031432220 is a wasteful number, since it uses less digits than its factorization.

12031432220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12031432220 its reverse (2223413021), we get a palindrome (14254845241).

The spelling of 12031432220 in words is "twelve billion, thirty-one million, four hundred thirty-two thousand, two hundred twenty".