11321111123 has 16 divisors (see below), whose sum is σ = 13361995776. Its totient is φ = 9386413920.

The previous prime is 11321111071. The next prime is 11321111141. The reversal of 11321111123 is 32111112311.

It is a cyclic number.

It is not a de Polignac number, because 11321111123 - 2¹² = 11321107027 is a prime.

It is a super-2 number, since 2×11321111123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11321111173) 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, 506165 + ... + 528057.

It is an arithmetic number, because the mean of its divisors is an integer number (835124736).

Almost surely, 2^11321111123 is an apocalyptic number.

11321111123 is a deficient number, since it is larger than the sum of its proper divisors (2040884653).

11321111123 is a wasteful number, since it uses less digits than its factorization.

11321111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24314.

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

Adding to 11321111123 its reverse (32111112311), we get a palindrome (43432223434).

It can be divided in two parts, 11 and 321111123, that multiplied together give a palindrome (3532222353).

The spelling of 11321111123 in words is "eleven billion, three hundred twenty-one million, one hundred eleven thousand, one hundred twenty-three".