321420103 has 4 divisors (see below), whose sum is σ = 321498520. Its totient is φ = 321341688.

The previous prime is 321420091. The next prime is 321420119. The reversal of 321420103 is 301024123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321420103 is a prime.

It is a super-2 number, since 2×321420103² = 206621765225061218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321420503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32700 + ... + 41377.

It is an arithmetic number, because the mean of its divisors is an integer number (80374630).

Almost surely, 2^321420103 is an apocalyptic number.

321420103 is a deficient number, since it is larger than the sum of its proper divisors (78417).

321420103 is an equidigital number, since it uses as much as digits as its factorization.

321420103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78416.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 321420103 is about 17928.1929652712. The cubic root of 321420103 is about 685.0006947619. Note that the first 3 decimals are identical.

Adding to 321420103 its reverse (301024123), we get a palindrome (622444226).

The spelling of 321420103 in words is "three hundred twenty-one million, four hundred twenty thousand, one hundred three".