22002121200 has 60 divisors (see below), whose sum is σ = 70480132088. Its totient is φ = 5867232000.

The previous prime is 22002121187. The next prime is 22002121237. The reversal of 22002121200 is 212120022.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent 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, 9166351 + ... + 9168750.

Almost surely, 2^22002121200 is an apocalyptic number.

22002121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22002121200 is an abundant number, since it is smaller than the sum of its proper divisors (48478010888).

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

22002121200 is a wasteful number, since it uses less digits than its factorization.

22002121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18335122 (or 18335111 counting only the distinct ones).

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

Adding to 22002121200 its reverse (212120022), we get a palindrome (22214241222).

The spelling of 22002121200 in words is "twenty-two billion, two million, one hundred twenty-one thousand, two hundred".