22122221200 has 60 divisors (see below), whose sum is σ = 54151492788. Its totient is φ = 8681920000.

The previous prime is 22122221161. The next prime is 22122221207. The reversal of 22122221200 is 212222122.

It can be written as a sum of positive squares in 6 ways, for example, as 1164447376 + 20957773824 = 34124^2 + 144768^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (22122221207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 500551 + ... + 542950.

Almost surely, 2^22122221200 is an apocalyptic number.

22122221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22122221200 is an abundant number, since it is smaller than the sum of its proper divisors (32029271588).

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

22122221200 is a wasteful number, since it uses less digits than its factorization.

22122221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043572 (or 1043561 counting only the distinct ones).

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

Adding to 22122221200 its reverse (212222122), we get a palindrome (22334443322).

The spelling of 22122221200 in words is "twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred".