321231011111 has 4 divisors (see below), whose sum is σ = 331593301824. Its totient is φ = 310868720400.

The previous prime is 321231011083. The next prime is 321231011117. The reversal of 321231011111 is 111110132123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111110132123 = 43 ⋅2583956561.

It is a cyclic number.

It is not a de Polignac number, because 321231011111 - 2¹⁴ = 321230994727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321231011111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321231011117) 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, 5181145310 + ... + 5181145371.

It is an arithmetic number, because the mean of its divisors is an integer number (82898325456).

Almost surely, 2^321231011111 is an apocalyptic number.

321231011111 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

321231011111 is a deficient number, since it is larger than the sum of its proper divisors (10362290713).

321231011111 is a wasteful number, since it uses less digits than its factorization.

321231011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362290712.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 321231011111 its reverse (111110132123), we get a palindrome (432341143234).

The spelling of 321231011111 in words is "three hundred twenty-one billion, two hundred thirty-one million, eleven thousand, one hundred eleven".