12220342400 has 96 divisors (see below), whose sum is σ = 34500708480. Its totient is φ = 4189824000.

The previous prime is 12220342369. The next prime is 12220342411. The reversal of 12220342400 is 424302221.

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 11 ways as a sum of consecutive naturals, for example, 250376 + ... + 295175.

It is an arithmetic number, because the mean of its divisors is an integer number (359382380).

Almost surely, 2^12220342400 is an apocalyptic number.

12220342400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220342400 is an abundant number, since it is smaller than the sum of its proper divisors (22280366080).

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

12220342400 is an equidigital number, since it uses as much as digits as its factorization.

12220342400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545582 (or 545565 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 12220342400 its reverse (424302221), we get a palindrome (12644644621).

The spelling of 12220342400 in words is "twelve billion, two hundred twenty million, three hundred forty-two thousand, four hundred".