12421144400 has 60 divisors (see below), whose sum is σ = 34104921312. Its totient is φ = 4258677120.

The previous prime is 12421144397. The next prime is 12421144429. The reversal of 12421144400 is 444112421.

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, 2215262 + ... + 2220861.

Almost surely, 2^12421144400 is an apocalyptic number.

12421144400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421144400 is an abundant number, since it is smaller than the sum of its proper divisors (21683776912).

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

12421144400 is a wasteful number, since it uses less digits than its factorization.

12421144400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436148 (or 4436137 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 12421144400 its reverse (444112421), we get a palindrome (12865256821).

The spelling of 12421144400 in words is "twelve billion, four hundred twenty-one million, one hundred forty-four thousand, four hundred".