21200122200 has 96 divisors (see below), whose sum is σ = 66371265360. Its totient is φ = 5597376000.

The previous prime is 21200122199. The next prime is 21200122201. The reversal of 21200122200 is 222100212.

It is an interprime number because it is at equal distance from previous prime (21200122199) and next prime (21200122201).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200122201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114319 + ... + 235518.

Almost surely, 2^21200122200 is an apocalyptic number.

21200122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200122200 is an abundant number, since it is smaller than the sum of its proper divisors (45171143160).

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

21200122200 is a wasteful number, since it uses less digits than its factorization.

21200122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349957 (or 349948 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21200122200 its reverse (222100212), we get a palindrome (21422222412).

It can be divided in two parts, 2120012 and 2200, that added together give a palindrome (2122212).

The spelling of 21200122200 in words is "twenty-one billion, two hundred million, one hundred twenty-two thousand, two hundred".