21202210221200 has 60 divisors (see below), whose sum is σ = 52581481379328. Its totient is φ = 8207307177600.

The previous prime is 21202210221187. The next prime is 21202210221229. The reversal of 21202210221200 is 212201220212.

It is a happy 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, 854915432 + ... + 854940231.

Almost surely, 2^{21202210221200} is an apocalyptic number.

21202210221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202210221200 is an abundant number, since it is smaller than the sum of its proper divisors (31379271158128).

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

21202210221200 is a wasteful number, since it uses less digits than its factorization.

21202210221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709855712 (or 1709855701 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202210221200 its reverse (212201220212), we get a palindrome (21414411441412).

The spelling of 21202210221200 in words is "twenty-one trillion, two hundred two billion, two hundred ten million, two hundred twenty-one thousand, two hundred".