22222021200 has 120 divisors (see below), whose sum is σ = 71229750528. Its totient is φ = 5922109440.

The previous prime is 22222021117. The next prime is 22222021201. The reversal of 22222021200 is 212022222.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22222021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222021201) 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, 2242657 + ... + 2252543.

Almost surely, 2^22222021200 is an apocalyptic number.

22222021200 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 22222021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35614875264).

22222021200 is an abundant number, since it is smaller than the sum of its proper divisors (49007729328).

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

22222021200 is a wasteful number, since it uses less digits than its factorization.

22222021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11781 (or 11770 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 22222021200 its reverse (212022222), we get a palindrome (22434043422).

The spelling of 22222021200 in words is "twenty-two billion, two hundred twenty-two million, twenty-one thousand, two hundred".