111342126131 has 4 divisors (see below), whose sum is σ = 111568892664. Its totient is φ = 111115359600.

The previous prime is 111342126107. The next prime is 111342126151. The reversal of 111342126131 is 131621243111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131621243111 = 31991 ⋅4114321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111342126131 is a prime.

It is a super-2 number, since 2×111342126131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111342126131.

It is not an unprimeable number, because it can be changed into a prime (111342126151) 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, 113382530 + ... + 113383511.

It is an arithmetic number, because the mean of its divisors is an integer number (27892223166).

Almost surely, 2^111342126131 is an apocalyptic number.

111342126131 is a deficient number, since it is larger than the sum of its proper divisors (226766533).

111342126131 is an equidigital number, since it uses as much as digits as its factorization.

111342126131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226766532.

The product of its digits is 864, while the sum is 26.

Adding to 111342126131 its reverse (131621243111), we get a palindrome (242963369242).

The spelling of 111342126131 in words is "one hundred eleven billion, three hundred forty-two million, one hundred twenty-six thousand, one hundred thirty-one".