321440212403 has 2 divisors, whose sum is σ = 321440212404. Its totient is φ = 321440212402.

The previous prime is 321440212393. The next prime is 321440212417. The reversal of 321440212403 is 304212044123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321440212403 - 2⁸ = 321440212147 is a prime.

It is not a weakly prime, because it can be changed into another prime (321440212463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160720106201 + 160720106202.

It is an arithmetic number, because the mean of its divisors is an integer number (160720106202).

Almost surely, 2^321440212403 is an apocalyptic number.

321440212403 is a deficient number, since it is larger than the sum of its proper divisors (1).

321440212403 is an equidigital number, since it uses as much as digits as its factorization.

321440212403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 321440212403 its reverse (304212044123), we get a palindrome (625652256526).

The spelling of 321440212403 in words is "three hundred twenty-one billion, four hundred forty million, two hundred twelve thousand, four hundred three".