1321304231403 has 24 divisors (see below), whose sum is σ = 2144725713312. Its totient is φ = 777757673088.

The previous prime is 1321304231369. The next prime is 1321304231431. The reversal of 1321304231403 is 3041324031231.

It is a happy number.

1321304231403 is a `hidden beast` number, since 1 + 3 + 21 + 3 + 0 + 4 + 231 + 403 = 666.

It is not a de Polignac number, because 1321304231403 - 2¹⁷ = 1321304100331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321304231453) 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, 245501626 + ... + 245507007.

It is an arithmetic number, because the mean of its divisors is an integer number (89363571388).

Almost surely, 2^{1321304231403} is an apocalyptic number.

1321304231403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321304231403 is a deficient number, since it is larger than the sum of its proper divisors (823421481909).

1321304231403 is a wasteful number, since it uses less digits than its factorization.

1321304231403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491008675 (or 491008672 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1321304231403 its reverse (3041324031231), we get a palindrome (4362628262634).

The spelling of 1321304231403 in words is "one trillion, three hundred twenty-one billion, three hundred four million, two hundred thirty-one thousand, four hundred three".