21202211200 has 96 divisors (see below), whose sum is σ = 52471429560. Its totient is φ = 8465448960.

The previous prime is 21202211189. The next prime is 21202211243. The reversal of 21202211200 is 211220212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1840659 + ... + 1852141.

Almost surely, 2^21202211200 is an apocalyptic number.

21202211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26235714780).

21202211200 is an abundant number, since it is smaller than the sum of its proper divisors (31269218360).

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

21202211200 is a wasteful number, since it uses less digits than its factorization.

21202211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12084 (or 12067 counting only the distinct ones).

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

Adding to 21202211200 its reverse (211220212), we get a palindrome (21413431412).

The spelling of 21202211200 in words is "twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred".