321012103 has 4 divisors (see below), whose sum is σ = 321559560. Its totient is φ = 320464648.

The previous prime is 321012077. The next prime is 321012113. The reversal of 321012103 is 301210123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301210123 = 97 ⋅3105259.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321012103 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321012113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272848 + ... + 274021.

It is an arithmetic number, because the mean of its divisors is an integer number (80389890).

Almost surely, 2^321012103 is an apocalyptic number.

321012103 is a deficient number, since it is larger than the sum of its proper divisors (547457).

321012103 is an equidigital number, since it uses as much as digits as its factorization.

321012103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547456.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 321012103 is about 17916.8106257782. The cubic root of 321012103 is about 684.7107329968.

Adding to 321012103 its reverse (301210123), we get a palindrome (622222226).

The spelling of 321012103 in words is "three hundred twenty-one million, twelve thousand, one hundred three".