22001121200 has 60 divisors (see below), whose sum is σ = 55966987080. Its totient is φ = 8282772480.

The previous prime is 22001121187. The next prime is 22001121223. The reversal of 22001121200 is 212110022.

It is a happy 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, 1610930 + ... + 1624529.

It is an arithmetic number, because the mean of its divisors is an integer number (932783118).

Almost surely, 2^22001121200 is an apocalyptic number.

22001121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001121200 is an abundant number, since it is smaller than the sum of its proper divisors (33965865880).

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

22001121200 is a wasteful number, since it uses less digits than its factorization.

22001121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235494 (or 3235483 counting only the distinct ones).

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

Adding to 22001121200 its reverse (212110022), we get a palindrome (22213231222).

The spelling of 22001121200 in words is "twenty-two billion, one million, one hundred twenty-one thousand, two hundred".