12120204440 has 16 divisors (see below), whose sum is σ = 27270460080. Its totient is φ = 4848081760.

The previous prime is 12120204433. The next prime is 12120204469. The reversal of 12120204440 is 4440202121.

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

It is a congruent number.

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, 151502516 + ... + 151502595.

It is an arithmetic number, because the mean of its divisors is an integer number (1704403755).

Almost surely, 2^12120204440 is an apocalyptic number.

12120204440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120204440 is an abundant number, since it is smaller than the sum of its proper divisors (15150255640).

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

12120204440 is a wasteful number, since it uses less digits than its factorization.

12120204440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303005122 (or 303005118 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12120204440 its reverse (4440202121), we get a palindrome (16560406561).

The spelling of 12120204440 in words is "twelve billion, one hundred twenty million, two hundred four thousand, four hundred forty".