1221312333200 has 60 divisors (see below), whose sum is σ = 3002440199088. Its totient is φ = 477163881600.

The previous prime is 1221312333191. The next prime is 1221312333203. The reversal of 1221312333200 is 23332131221.

It is not an unprimeable number, because it can be changed into a prime (1221312333203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35486066 + ... + 35520465.

Almost surely, 2^{1221312333200} is an apocalyptic number.

1221312333200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221312333200 is an abundant number, since it is smaller than the sum of its proper divisors (1781127865888).

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

1221312333200 is a wasteful number, since it uses less digits than its factorization.

1221312333200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71006592 (or 71006581 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1221312333200 its reverse (23332131221), we get a palindrome (1244644464421).

The spelling of 1221312333200 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, three hundred thirty-three thousand, two hundred".