1222121112200 has 96 divisors (see below), whose sum is σ = 2991380340000. Its totient is φ = 463057689600.

The previous prime is 1222121112187. The next prime is 1222121112203. The reversal of 1222121112200 is 22111212221.

It is not an unprimeable number, because it can be changed into a prime (1222121112203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36649535 + ... + 36682865.

It is an arithmetic number, because the mean of its divisors is an integer number (31160211875).

Almost surely, 2^{1222121112200} is an apocalyptic number.

1222121112200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222121112200 is an abundant number, since it is smaller than the sum of its proper divisors (1769259227800).

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

1222121112200 is a wasteful number, since it uses less digits than its factorization.

1222121112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43015 (or 43006 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222121112200 its reverse (22111212221), we get a palindrome (1244232324421).

The spelling of 1222121112200 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred".