111231013021311 has 4 divisors (see below), whose sum is σ = 148308017361752. Its totient is φ = 74154008680872.

The previous prime is 111231013021309. The next prime is 111231013021393. The reversal of 111231013021311 is 113120310132111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 111231013021311 - 2¹ = 111231013021309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231013021211) 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, 18538502170216 + ... + 18538502170221.

It is an arithmetic number, because the mean of its divisors is an integer number (37077004340438).

Almost surely, 2^{111231013021311} is an apocalyptic number.

111231013021311 is a deficient number, since it is larger than the sum of its proper divisors (37077004340441).

111231013021311 is an equidigital number, since it uses as much as digits as its factorization.

111231013021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37077004340440.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 111231013021311 its reverse (113120310132111), we get a palindrome (224351323153422).

The spelling of 111231013021311 in words is "one hundred eleven trillion, two hundred thirty-one billion, thirteen million, twenty-one thousand, three hundred eleven".