321303042403 has 12 divisors (see below), whose sum is σ = 377613890472. Its totient is φ = 272563401600.

The previous prime is 321303042397. The next prime is 321303042409. The reversal of 321303042403 is 304240303123.

It is an interprime number because it is at equal distance from previous prime (321303042397) and next prime (321303042409).

It is not a de Polignac number, because 321303042403 - 2²⁵ = 321269487971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321303042409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33795273 + ... + 33804778.

It is an arithmetic number, because the mean of its divisors is an integer number (31467824206).

Almost surely, 2^321303042403 is an apocalyptic number.

321303042403 is a deficient number, since it is larger than the sum of its proper divisors (56310848069).

321303042403 is an equidigital number, since it uses as much as digits as its factorization.

321303042403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67600162 (or 67600155 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 321303042403 its reverse (304240303123), we get a palindrome (625543345526).

The spelling of 321303042403 in words is "three hundred twenty-one billion, three hundred three million, forty-two thousand, four hundred three".