12212200400 has 30 divisors (see below), whose sum is σ = 29339812422. Its totient is φ = 4884880000.

The previous prime is 12212200379. The next prime is 12212200453. The reversal of 12212200400 is 400221221.

It can be written as a sum of positive squares in 3 ways, for example, as 1113156496 + 11099043904 = 33364^2 + 105352^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15264851 + ... + 15265650.

Almost surely, 2^12212200400 is an apocalyptic number.

12212200400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212200400 is an abundant number, since it is smaller than the sum of its proper divisors (17127612022).

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

12212200400 is a wasteful number, since it uses less digits than its factorization.

12212200400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30530519 (or 30530508 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12212200400 its reverse (400221221), we get a palindrome (12612421621).

The spelling of 12212200400 in words is "twelve billion, two hundred twelve million, two hundred thousand, four hundred".