1331303244403 has 4 divisors (see below), whose sum is σ = 1452330812088. Its totient is φ = 1210275676720.

The previous prime is 1331303244389. The next prime is 1331303244443. The reversal of 1331303244403 is 3044423031331.

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

It is a de Polignac number, because none of the positive numbers 2^k-1331303244403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331303244443) 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, 60513783826 + ... + 60513783847.

It is an arithmetic number, because the mean of its divisors is an integer number (363082703022).

Almost surely, 2^{1331303244403} is an apocalyptic number.

1331303244403 is a deficient number, since it is larger than the sum of its proper divisors (121027567685).

1331303244403 is a wasteful number, since it uses less digits than its factorization.

1331303244403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121027567684.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 1331303244403 its reverse (3044423031331), we get a palindrome (4375726275734).

The spelling of 1331303244403 in words is "one trillion, three hundred thirty-one billion, three hundred three million, two hundred forty-four thousand, four hundred three".