21202120202200 has 96 divisors (see below), whose sum is σ = 56894855326560. Its totient is φ = 7197325056000.

The previous prime is 21202120202189. The next prime is 21202120202251. The reversal of 21202120202200 is 220202120212.

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, 74830737 + ... + 75113536.

It is an arithmetic number, because the mean of its divisors is an integer number (592654742985).

Almost surely, 2^{21202120202200} is an apocalyptic number.

21202120202200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202120202200 is an abundant number, since it is smaller than the sum of its proper divisors (35692735124360).

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

21202120202200 is a wasteful number, since it uses less digits than its factorization.

21202120202200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149944397 (or 149944388 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21202120202200 its reverse (220202120212), we get a palindrome (21422322322412).

The spelling of 21202120202200 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, two hundred two thousand, two hundred".