11321123111111 has 32 divisors (see below), whose sum is σ = 12597011032320. Its totient is φ = 10087902316800.

The previous prime is 11321123111101. The next prime is 11321123111113. The reversal of 11321123111111 is 11111132112311.

It is not a de Polignac number, because 11321123111111 - 2²⁶ = 11321056002247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321123111113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1262245835 + ... + 1262254803.

It is an arithmetic number, because the mean of its divisors is an integer number (393656594760).

Almost surely, 2^{11321123111111} is an apocalyptic number.

11321123111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11321123111111 is a deficient number, since it is larger than the sum of its proper divisors (1275887921209).

11321123111111 is a wasteful number, since it uses less digits than its factorization.

11321123111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17375.

The product of its digits is 36, while the sum is 20.

Adding to 11321123111111 its reverse (11111132112311), we get a palindrome (22432255223422).

It can be divided in two parts, 1132112311 and 1111, that multiplied together give a palindrome (1257776777521).

The spelling of 11321123111111 in words is "eleven trillion, three hundred twenty-one billion, one hundred twenty-three million, one hundred eleven thousand, one hundred eleven".