321111310103 has 4 divisors (see below), whose sum is σ = 321297895968. Its totient is φ = 320924724240.

The previous prime is 321111310021. The next prime is 321111310123. The reversal of 321111310103 is 301013111123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301013111123 = 691 ⋅435619553.

It is a cyclic number.

It is not a de Polignac number, because 321111310103 - 2¹⁶ = 321111244567 is a prime.

It is a super-2 number, since 2×321111310103² (a number of 24 digits) 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 (321111310123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93290351 + ... + 93293792.

It is an arithmetic number, because the mean of its divisors is an integer number (80324473992).

Almost surely, 2^321111310103 is an apocalyptic number.

321111310103 is a deficient number, since it is larger than the sum of its proper divisors (186585865).

321111310103 is a wasteful number, since it uses less digits than its factorization.

321111310103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186585864.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 321111310103 its reverse (301013111123), we get a palindrome (622124421226).

The spelling of 321111310103 in words is "three hundred twenty-one billion, one hundred eleven million, three hundred ten thousand, one hundred three".