21222021200000 has 96 divisors (see below), whose sum is σ = 52844425435620. Its totient is φ = 8488808320000.

The previous prime is 21222021199913. The next prime is 21222021200033. The reversal of 21222021200000 is 212022212.

It can be written as a sum of positive squares in 6 ways, for example, as 4072550019136 + 17149471180864 = 2018056^2 + 4141192^2 .

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, 26127527 + ... + 26927526.

Almost surely, 2^{21222021200000} is an apocalyptic number.

21222021200000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222021200000 is an abundant number, since it is smaller than the sum of its proper divisors (31622404235620).

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

21222021200000 is an frugal number, since it uses more digits than its factorization.

21222021200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53055092 (or 53055060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21222021200000 its reverse (212022212), we get a palindrome (21222233222212).

The spelling of 21222021200000 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, two hundred thousand".