12501421400 has 48 divisors (see below), whose sum is σ = 31301642400. Its totient is φ = 4615908480.

The previous prime is 12501421399. The next prime is 12501421501. The reversal of 12501421400 is 412410521.

It is a happy number.

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, 2401520 + ... + 2406719.

It is an arithmetic number, because the mean of its divisors is an integer number (652117550).

Almost surely, 2^12501421400 is an apocalyptic number.

12501421400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12501421400 is an abundant number, since it is smaller than the sum of its proper divisors (18800221000).

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

12501421400 is a wasteful number, since it uses less digits than its factorization.

12501421400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4808268 (or 4808259 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 12501421400 its reverse (412410521), we get a palindrome (12913831921).

The spelling of 12501421400 in words is "twelve billion, five hundred one million, four hundred twenty-one thousand, four hundred".