1221300321023 has 4 divisors (see below), whose sum is σ = 1233891046080. Its totient is φ = 1208709595968.

The previous prime is 1221300320983. The next prime is 1221300321089. The reversal of 1221300321023 is 3201230031221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1221300321023 - 2¹⁴ = 1221300304639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221300320986 and 1221300321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221300321523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6295362383 + ... + 6295362576.

It is an arithmetic number, because the mean of its divisors is an integer number (308472761520).

Almost surely, 2^{1221300321023} is an apocalyptic number.

1221300321023 is a deficient number, since it is larger than the sum of its proper divisors (12590725057).

1221300321023 is an equidigital number, since it uses as much as digits as its factorization.

1221300321023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12590725056.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1221300321023 its reverse (3201230031221), we get a palindrome (4422530352244).

The spelling of 1221300321023 in words is "one trillion, two hundred twenty-one billion, three hundred million, three hundred twenty-one thousand, twenty-three".