1221201320300 has 72 divisors (see below), whose sum is σ = 3004056426000. Its totient is φ = 427173246720.

The previous prime is 1221201320299. The next prime is 1221201320303. The reversal of 1221201320300 is 30231021221.

It is not an unprimeable number, because it can be changed into a prime (1221201320303) 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 23 ways as a sum of consecutive naturals, for example, 24695975 + ... + 24745374.

Almost surely, 2^{1221201320300} is an apocalyptic number.

1221201320300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221201320300 is an abundant number, since it is smaller than the sum of its proper divisors (1782855105700).

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

1221201320300 is a wasteful number, since it uses less digits than its factorization.

1221201320300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49441395 (or 49441388 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1221201320300 its reverse (30231021221), we get a palindrome (1251432341521).

The spelling of 1221201320300 in words is "one trillion, two hundred twenty-one billion, two hundred one million, three hundred twenty thousand, three hundred".