111200312131 has 4 divisors (see below), whose sum is σ = 112723604152. Its totient is φ = 109677020112.

The previous prime is 111200312129. The next prime is 111200312147. The reversal of 111200312131 is 131213002111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131213002111 = 14639 ⋅8963249.

It is a cyclic number.

It is not a de Polignac number, because 111200312131 - 2¹ = 111200312129 is a prime.

It is a super-2 number, since 2×111200312131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111200312831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761645901 + ... + 761646046.

It is an arithmetic number, because the mean of its divisors is an integer number (28180901038).

Almost surely, 2^111200312131 is an apocalyptic number.

111200312131 is a deficient number, since it is larger than the sum of its proper divisors (1523292021).

111200312131 is an equidigital number, since it uses as much as digits as its factorization.

111200312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523292020.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111200312131 its reverse (131213002111), we get a palindrome (242413314242).

The spelling of 111200312131 in words is "one hundred eleven billion, two hundred million, three hundred twelve thousand, one hundred thirty-one".