22211021200 has 60 divisors (see below), whose sum is σ = 53912196100. Its totient is φ = 8792801280.

The previous prime is 22211021191. The next prime is 22211021243. The reversal of 22211021200 is 212011222.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 55294096 + 22155727104 = 7436^2 + 148848^2 .

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, 247425 + ... + 325024.

Almost surely, 2^22211021200 is an apocalyptic number.

22211021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22211021200 is an abundant number, since it is smaller than the sum of its proper divisors (31701174900).

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

22211021200 is a wasteful number, since it uses less digits than its factorization.

22211021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572564 (or 572553 counting only the distinct ones).

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

Adding to 22211021200 its reverse (212011222), we get a palindrome (22423032422).

The spelling of 22211021200 in words is "twenty-two billion, two hundred eleven million, twenty-one thousand, two hundred".