12031133220 has 72 divisors (see below), whose sum is σ = 36551196864. Its totient is φ = 3203312448.

The previous prime is 12031133209. The next prime is 12031133237. The reversal of 12031133220 is 2233113021.

12031133220 is a `hidden beast` number, since 1 + 2 + 0 + 311 + 332 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 12031133193 and 12031133202.

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, 64807 + ... + 168113.

It is an arithmetic number, because the mean of its divisors is an integer number (507655512).

Almost surely, 2^12031133220 is an apocalyptic number.

12031133220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12031133220 is an abundant number, since it is smaller than the sum of its proper divisors (24520063644).

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

12031133220 is a wasteful number, since it uses less digits than its factorization.

12031133220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103969 (or 103964 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12031133220 its reverse (2233113021), we get a palindrome (14264246241).

The spelling of 12031133220 in words is "twelve billion, thirty-one million, one hundred thirty-three thousand, two hundred twenty".