1220321021300 has 36 divisors (see below), whose sum is σ = 2672391104460. Its totient is φ = 483650161920.

The previous prime is 1220321021291. The next prime is 1220321021317. The reversal of 1220321021300 is 31201230221.

It can be written as a sum of positive squares in 6 ways, for example, as 65547264484 + 1154773756816 = 256022^2 + 1074604^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55967129 + ... + 55988928.

It is an arithmetic number, because the mean of its divisors is an integer number (74233086235).

Almost surely, 2^{1220321021300} is an apocalyptic number.

1220321021300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220321021300 is an abundant number, since it is smaller than the sum of its proper divisors (1452070083160).

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

1220321021300 is a wasteful number, since it uses less digits than its factorization.

1220321021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111956180 (or 111956173 counting only the distinct ones).

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

Adding to 1220321021300 its reverse (31201230221), we get a palindrome (1251522251521).

The spelling of 1220321021300 in words is "one trillion, two hundred twenty billion, three hundred twenty-one million, twenty-one thousand, three hundred".