12120033440 has 24 divisors (see below), whose sum is σ = 28633579380. Its totient is φ = 4848013312.

The previous prime is 12120033413. The next prime is 12120033469. The reversal of 12120033440 is 4433002121.

It can be written as a sum of positive squares in 2 ways, for example, as 12070977424 + 49056016 = 109868^2 + 7004^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37874945 + ... + 37875264.

Almost surely, 2^12120033440 is an apocalyptic number.

12120033440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120033440 is an abundant number, since it is smaller than the sum of its proper divisors (16513545940).

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

12120033440 is an equidigital number, since it uses as much as digits as its factorization.

12120033440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75750224 (or 75750216 counting only the distinct ones).

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

Adding to 12120033440 its reverse (4433002121), we get a palindrome (16553035561).

The spelling of 12120033440 in words is "twelve billion, one hundred twenty million, thirty-three thousand, four hundred forty".