12051404220 has 24 divisors (see below), whose sum is σ = 33743931984. Its totient is φ = 3213707776.

The previous prime is 12051404213. The next prime is 12051404221. The reversal of 12051404220 is 2240415021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051404221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100428309 + ... + 100428428.

It is an arithmetic number, because the mean of its divisors is an integer number (1405997166).

Almost surely, 2^12051404220 is an apocalyptic number.

12051404220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12051404220 is an abundant number, since it is smaller than the sum of its proper divisors (21692527764).

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

12051404220 is a wasteful number, since it uses less digits than its factorization.

12051404220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200856749 (or 200856747 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 12051404220 its reverse (2240415021), we get a palindrome (14291819241).

The spelling of 12051404220 in words is "twelve billion, fifty-one million, four hundred four thousand, two hundred twenty".