1221112200200 has 48 divisors (see below), whose sum is σ = 2870985748500. Its totient is φ = 482956728320.

The previous prime is 1221112200197. The next prime is 1221112200229. The reversal of 1221112200200 is 20022111221.

It can be written as a sum of positive squares in 6 ways, for example, as 16908841156 + 1204203359044 = 130034^2 + 1097362^2 .

It is a super-2 number, since 2×1221112200200² (a number of 25 digits) contains 22 as substring.

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, 34283105 + ... + 34318704.

Almost surely, 2^{1221112200200} is an apocalyptic number.

1221112200200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221112200200 is an abundant number, since it is smaller than the sum of its proper divisors (1649873548300).

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

1221112200200 is a wasteful number, since it uses less digits than its factorization.

1221112200200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68601914 (or 68601905 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221112200200 its reverse (20022111221), we get a palindrome (1241134311421).

The spelling of 1221112200200 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred thousand, two hundred".