21321402200 has 96 divisors (see below), whose sum is σ = 58035972960. Its totient is φ = 7131878400.

The previous prime is 21321402199. The next prime is 21321402211. The reversal of 21321402200 is 220412312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128327 + ... + 243126.

It is an arithmetic number, because the mean of its divisors is an integer number (604541385).

Almost surely, 2^21321402200 is an apocalyptic number.

21321402200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321402200 is an abundant number, since it is smaller than the sum of its proper divisors (36714570760).

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

21321402200 is a wasteful number, since it uses less digits than its factorization.

21321402200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371517 (or 371508 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21321402200 its reverse (220412312), we get a palindrome (21541814512).

The spelling of 21321402200 in words is "twenty-one billion, three hundred twenty-one million, four hundred two thousand, two hundred".