1221143120303 has 4 divisors (see below), whose sum is σ = 1222630506168. Its totient is φ = 1219655734440.

The previous prime is 1221143120257. The next prime is 1221143120359. The reversal of 1221143120303 is 3030213411221.

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 1221143120303 - 2²⁰ = 1221142071727 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 (1221143120803) 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, 743691701 + ... + 743693342.

It is an arithmetic number, because the mean of its divisors is an integer number (305657626542).

Almost surely, 2^{1221143120303} is an apocalyptic number.

1221143120303 is a deficient number, since it is larger than the sum of its proper divisors (1487385865).

1221143120303 is an equidigital number, since it uses as much as digits as its factorization.

1221143120303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487385864.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1221143120303 its reverse (3030213411221), we get a palindrome (4251356531524).

The spelling of 1221143120303 in words is "one trillion, two hundred twenty-one billion, one hundred forty-three million, one hundred twenty thousand, three hundred three".