1220003311403 has 4 divisors (see below), whose sum is σ = 1220655372768. Its totient is φ = 1219351250040.

The previous prime is 1220003311379. The next prime is 1220003311459. The reversal of 1220003311403 is 3041133000221.

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 1220003311403 - 2¹⁸ = 1220003049259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220003311463) 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, 326027876 + ... + 326031617.

It is an arithmetic number, because the mean of its divisors is an integer number (305163843192).

Almost surely, 2^{1220003311403} is an apocalyptic number.

1220003311403 is a deficient number, since it is larger than the sum of its proper divisors (652061365).

1220003311403 is an equidigital number, since it uses as much as digits as its factorization.

1220003311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652061364.

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

Adding to 1220003311403 its reverse (3041133000221), we get a palindrome (4261136311624).

The spelling of 1220003311403 in words is "one trillion, two hundred twenty billion, three million, three hundred eleven thousand, four hundred three".