22100222121200 has 120 divisors (see below), whose sum is σ = 53990179574016. Its totient is φ = 8692187616000.

The previous prime is 22100222121193. The next prime is 22100222121221. The reversal of 22100222121200 is 212122200122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5427785 + ... + 8582615.

Almost surely, 2^{22100222121200} is an apocalyptic number.

22100222121200 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 22100222121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26995089787008).

22100222121200 is an abundant number, since it is smaller than the sum of its proper divisors (31889957452816).

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

22100222121200 is a wasteful number, since it uses less digits than its factorization.

22100222121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155143 (or 3155132 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22100222121200 its reverse (212122200122), we get a palindrome (22312344321322).

The spelling of 22100222121200 in words is "twenty-two trillion, one hundred billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred".