21143313300 has 72 divisors (see below), whose sum is σ = 62828055136. Its totient is φ = 5485829760.

The previous prime is 21143313281. The next prime is 21143313307. The reversal of 21143313300 is 331334112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143313307) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 941302 + ... + 963501.

Almost surely, 2^21143313300 is an apocalyptic number.

21143313300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21143313300 is an abundant number, since it is smaller than the sum of its proper divisors (41684741836).

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

21143313300 is a wasteful number, since it uses less digits than its factorization.

21143313300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904857 (or 1904850 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21143313300 its reverse (331334112), we get a palindrome (21474647412).

The spelling of 21143313300 in words is "twenty-one billion, one hundred forty-three million, three hundred thirteen thousand, three hundred".