111311331120231 has 16 divisors (see below), whose sum is σ = 162334587020160. Its totient is φ = 67283414341920.

The previous prime is 111311331120203. The next prime is 111311331120257. The reversal of 111311331120231 is 132021133113111.

It is not a de Polignac number, because 111311331120231 - 2³¹ = 111309183636583 is a prime.

It is a super-2 number, since 2×111311331120231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311331120331) 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, 4449948760 + ... + 4449973773.

It is an arithmetic number, because the mean of its divisors is an integer number (10145911688760).

Almost surely, 2^{111311331120231} is an apocalyptic number.

111311331120231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111311331120231 is a deficient number, since it is larger than the sum of its proper divisors (51023255899929).

111311331120231 is a wasteful number, since it uses less digits than its factorization.

111311331120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8899922926.

The product of its (nonzero) digits is 324, while the sum is 24.

Adding to 111311331120231 its reverse (132021133113111), we get a palindrome (243332464233342).

The spelling of 111311331120231 in words is "one hundred eleven trillion, three hundred eleven billion, three hundred thirty-one million, one hundred twenty thousand, two hundred thirty-one".