321111100123 has 16 divisors (see below), whose sum is σ = 372390935040. Its totient is φ = 273816828000.

The previous prime is 321111100109. The next prime is 321111100147. The reversal of 321111100123 is 321001111123.

It is a happy number.

It is not a de Polignac number, because 321111100123 - 2²⁹ = 320574229211 is a prime.

It is a super-2 number, since 2×321111100123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321111100097 and 321111100106.

It is not an unprimeable number, because it can be changed into a prime (321111100103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7584915 + ... + 7627132.

It is an arithmetic number, because the mean of its divisors is an integer number (23274433440).

Almost surely, 2^321111100123 is an apocalyptic number.

321111100123 is a deficient number, since it is larger than the sum of its proper divisors (51279834917).

321111100123 is a wasteful number, since it uses less digits than its factorization.

321111100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15212178.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 321111100123 its reverse (321001111123), we get a palindrome (642112211246).

The spelling of 321111100123 in words is "three hundred twenty-one billion, one hundred eleven million, one hundred thousand, one hundred twenty-three".