1221223301303 has 4 divisors (see below), whose sum is σ = 1234944911520. Its totient is φ = 1207501691088.

The previous prime is 1221223301273. The next prime is 1221223301321. The reversal of 1221223301303 is 3031033221221.

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 1221223301303 - 2²⁶ = 1221156192439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221223301383) 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 3 ways as a sum of consecutive naturals, for example, 6860804975 + ... + 6860805152.

It is an arithmetic number, because the mean of its divisors is an integer number (308736227880).

Almost surely, 2^{1221223301303} is an apocalyptic number.

1221223301303 is a deficient number, since it is larger than the sum of its proper divisors (13721610217).

1221223301303 is an equidigital number, since it uses as much as digits as its factorization.

1221223301303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13721610216.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1221223301303 its reverse (3031033221221), we get a palindrome (4252256522524).

The spelling of 1221223301303 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-three million, three hundred one thousand, three hundred three".