1321020012303 has 24 divisors (see below), whose sum is σ = 1912093425216. Its totient is φ = 878856091200.

The previous prime is 1321020012283. The next prime is 1321020012379. The reversal of 1321020012303 is 3032100201231.

It is not a de Polignac number, because 1321020012303 - 2⁵ = 1321020012271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321025012303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23718298 + ... + 23773928.

It is an arithmetic number, because the mean of its divisors is an integer number (79670559384).

Almost surely, 2^{1321020012303} is an apocalyptic number.

1321020012303 is a deficient number, since it is larger than the sum of its proper divisors (591073412913).

1321020012303 is a wasteful number, since it uses less digits than its factorization.

1321020012303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61055 (or 61052 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1321020012303 its reverse (3032100201231), we get a palindrome (4353120213534).

The spelling of 1321020012303 in words is "one trillion, three hundred twenty-one billion, twenty million, twelve thousand, three hundred three".