111131311323231 has 16 divisors (see below), whose sum is σ = 165264983473920. Its totient is φ = 73805839201080.

The previous prime is 111131311323217. The next prime is 111131311323257. The reversal of 111131311323231 is 132323113131111.

111131311323231 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 3 + 1 + 311 + 323 + 23 + 1 = 666.

It is not a de Polignac number, because 111131311323231 - 2¹⁵ = 111131311290463 is a prime.

It is a super-2 number, since 2×111131311323231² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 111131311323195 and 111131311323204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111131311323931) 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, 7825039465 + ... + 7825053666.

It is an arithmetic number, because the mean of its divisors is an integer number (10329061467120).

Almost surely, 2^{111131311323231} is an apocalyptic number.

111131311323231 is a deficient number, since it is larger than the sum of its proper divisors (54133672150689).

111131311323231 is a wasteful number, since it uses less digits than its factorization.

111131311323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15650093403 (or 15650093397 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

Adding to 111131311323231 its reverse (132323113131111), we get a palindrome (243454424454342).

The spelling of 111131311323231 in words is "one hundred eleven trillion, one hundred thirty-one billion, three hundred eleven million, three hundred twenty-three thousand, two hundred thirty-one".