21143222300 has 36 divisors (see below), whose sum is σ = 46658445960. Its totient is φ = 8313942720.

The previous prime is 21143222297. The next prime is 21143222311. The reversal of 21143222300 is 322234112.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1785899 + ... + 1797698.

Almost surely, 2^21143222300 is an apocalyptic number.

21143222300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21143222300 is an abundant number, since it is smaller than the sum of its proper divisors (25515223660).

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

21143222300 is a wasteful number, since it uses less digits than its factorization.

21143222300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583670 (or 3583663 counting only the distinct ones).

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

Adding to 21143222300 its reverse (322234112), we get a palindrome (21465456412).

The spelling of 21143222300 in words is "twenty-one billion, one hundred forty-three million, two hundred twenty-two thousand, three hundred".