1220103203321 has 4 divisors (see below), whose sum is σ = 1243124018532. Its totient is φ = 1197082388112.

The previous prime is 1220103203243. The next prime is 1220103203357. The reversal of 1220103203321 is 1233023010221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1085370159721 + 134733043600 = 1041811^2 + 367060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220103203321 - 2³⁸ = 945225296377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220103203293 and 1220103203302.

It is not an unprimeable number, because it can be changed into a prime (1220103203021) 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, 11510407526 + ... + 11510407631.

It is an arithmetic number, because the mean of its divisors is an integer number (310781004633).

Almost surely, 2^{1220103203321} is an apocalyptic number.

It is an amenable number.

1220103203321 is a deficient number, since it is larger than the sum of its proper divisors (23020815211).

1220103203321 is an equidigital number, since it uses as much as digits as its factorization.

1220103203321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23020815210.

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

Adding to 1220103203321 its reverse (1233023010221), we get a palindrome (2453126213542).

The spelling of 1220103203321 in words is "one trillion, two hundred twenty billion, one hundred three million, two hundred three thousand, three hundred twenty-one".