1221300320983 has 2 divisors, whose sum is σ = 1221300320984. Its totient is φ = 1221300320982.

The previous prime is 1221300320963. The next prime is 1221300321089. The reversal of 1221300320983 is 3890230031221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221300320983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221300320963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610650160491 + 610650160492.

It is an arithmetic number, because the mean of its divisors is an integer number (610650160492).

Almost surely, 2^{1221300320983} is an apocalyptic number.

1221300320983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221300320983 is an equidigital number, since it uses as much as digits as its factorization.

1221300320983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 1221300320983 in words is "one trillion, two hundred twenty-one billion, three hundred million, three hundred twenty thousand, nine hundred eighty-three".