21202112200000 has 84 divisors (see below), whose sum is σ = 52587811406844. Its totient is φ = 8480844800000.

The previous prime is 21202112199977. The next prime is 21202112200021. The reversal of 21202112200000 is 221120212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 20085742450944 + 1116369749056 = 4481712^2 + 1056584^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52805281 + ... + 53205280.

It is an arithmetic number, because the mean of its divisors is an integer number (626045373891).

Almost surely, 2^{21202112200000} is an apocalyptic number.

21202112200000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202112200000 is an abundant number, since it is smaller than the sum of its proper divisors (31385699206844).

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

21202112200000 is an frugal number, since it uses more digits than its factorization.

21202112200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106010598 (or 106010568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21202112200000 its reverse (221120212), we get a palindrome (21202333320212).

The spelling of 21202112200000 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, two hundred thousand".