111243544331 has 4 divisors (see below), whose sum is σ = 112344965664. Its totient is φ = 110142123000.

The previous prime is 111243544327. The next prime is 111243544369. The reversal of 111243544331 is 133445342111.

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

It is a cyclic number.

It is not a de Polignac number, because 111243544331 - 2² = 111243544327 is a prime.

It is a super-2 number, since 2×111243544331² (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 (111243544031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550710515 + ... + 550710716.

It is an arithmetic number, because the mean of its divisors is an integer number (28086241416).

Almost surely, 2^111243544331 is an apocalyptic number.

111243544331 is a deficient number, since it is larger than the sum of its proper divisors (1101421333).

111243544331 is a wasteful number, since it uses less digits than its factorization.

111243544331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101421332.

The product of its digits is 17280, while the sum is 32.

Adding to 111243544331 its reverse (133445342111), we get a palindrome (244688886442).

The spelling of 111243544331 in words is "one hundred eleven billion, two hundred forty-three million, five hundred forty-four thousand, three hundred thirty-one".