1220320321403 has 8 divisors (see below), whose sum is σ = 1285068448320. Its totient is φ = 1155624268680.

The previous prime is 1220320321397. The next prime is 1220320321421. The reversal of 1220320321403 is 3041230230221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220320321403 - 2²⁶ = 1220253212539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220320321453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12970433 + ... + 13064178.

It is an arithmetic number, because the mean of its divisors is an integer number (160633556040).

Almost surely, 2^{1220320321403} is an apocalyptic number.

1220320321403 is a deficient number, since it is larger than the sum of its proper divisors (64748126917).

1220320321403 is a wasteful number, since it uses less digits than its factorization.

1220320321403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26037097.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 1220320321403 its reverse (3041230230221), we get a palindrome (4261550551624).

The spelling of 1220320321403 in words is "one trillion, two hundred twenty billion, three hundred twenty million, three hundred twenty-one thousand, four hundred three".