21022321300 has 18 divisors (see below), whose sum is σ = 45618437438. Its totient is φ = 8408928480.

The previous prime is 21022321291. The next prime is 21022321387. The reversal of 21022321300 is 312322012.

It can be written as a sum of positive squares in 3 ways, for example, as 971194896 + 20051126404 = 31164^2 + 141602^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105111507 + ... + 105111706.

Almost surely, 2^21022321300 is an apocalyptic number.

21022321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022321300 is an abundant number, since it is smaller than the sum of its proper divisors (24596116138).

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

21022321300 is a wasteful number, since it uses less digits than its factorization.

21022321300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210223227 (or 210223220 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21022321300 its reverse (312322012), we get a palindrome (21334643312).

The spelling of 21022321300 in words is "twenty-one billion, twenty-two million, three hundred twenty-one thousand, three hundred".