1221303332300 has 72 divisors (see below), whose sum is σ = 2708754347376. Its totient is φ = 477791292160.

The previous prime is 1221303332287. The next prime is 1221303332317. The reversal of 1221303332300 is 32333031221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1316639 + ... + 2043561.

It is an arithmetic number, because the mean of its divisors is an integer number (37621588158).

Almost surely, 2^{1221303332300} is an apocalyptic number.

1221303332300 is a gapful number since it is divisible by the number (10) 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 1221303332300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354377173688).

1221303332300 is an abundant number, since it is smaller than the sum of its proper divisors (1487451015076).

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

1221303332300 is a wasteful number, since it uses less digits than its factorization.

1221303332300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727307 (or 727300 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 1221303332300 its reverse (32333031221), we get a palindrome (1253636363521).

The spelling of 1221303332300 in words is "one trillion, two hundred twenty-one billion, three hundred three million, three hundred thirty-two thousand, three hundred".