21421232300 has 72 divisors (see below), whose sum is σ = 51125019456. Its totient is φ = 7741071360.

The previous prime is 21421232257. The next prime is 21421232351. The reversal of 21421232300 is 323212412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114197 + ... + 236396.

Almost surely, 2^21421232300 is an apocalyptic number.

21421232300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21421232300 is an abundant number, since it is smaller than the sum of its proper divisors (29703787156).

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

21421232300 is a wasteful number, since it uses less digits than its factorization.

21421232300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350667 (or 350660 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21421232300 its reverse (323212412), we get a palindrome (21744444712).

The spelling of 21421232300 in words is "twenty-one billion, four hundred twenty-one million, two hundred thirty-two thousand, three hundred".