21123200300 has 36 divisors (see below), whose sum is σ = 45893218896. Its totient is φ = 8438980800.

The previous prime is 21123200269. The next prime is 21123200311. The reversal of 21123200300 is 300232112.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 46031 + ... + 210630.

It is an arithmetic number, because the mean of its divisors is an integer number (1274811636).

Almost surely, 2^21123200300 is an apocalyptic number.

21123200300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21123200300 is an abundant number, since it is smaller than the sum of its proper divisors (24770018596).

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

21123200300 is a wasteful number, since it uses less digits than its factorization.

21123200300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257498 (or 257491 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21123200300 its reverse (300232112), we get a palindrome (21423432412).

The spelling of 21123200300 in words is "twenty-one billion, one hundred twenty-three million, two hundred thousand, three hundred".