21220110200 has 48 divisors (see below), whose sum is σ = 49365809880. Its totient is φ = 8483045760.

The previous prime is 21220110169. The next prime is 21220110211. The reversal of 21220110200 is 201102212.

It is a happy number.

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, 319034 + ... + 379766.

Almost surely, 2^21220110200 is an apocalyptic number.

21220110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220110200 is an abundant number, since it is smaller than the sum of its proper divisors (28145699680).

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

21220110200 is a wasteful number, since it uses less digits than its factorization.

21220110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62496 (or 62487 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21220110200 its reverse (201102212), we get a palindrome (21421212412).

The spelling of 21220110200 in words is "twenty-one billion, two hundred twenty million, one hundred ten thousand, two hundred".