111311103031 has 4 divisors (see below), whose sum is σ = 117858814992. Its totient is φ = 104763391072.

The previous prime is 111311102999. The next prime is 111311103037. The reversal of 111311103031 is 130301113111.

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

It is not a de Polignac number, because 111311103031 - 2⁵ = 111311102999 is a prime.

It is a super-2 number, since 2×111311103031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111311102996 and 111311103014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311103037) 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, 3273855955 + ... + 3273855988.

It is an arithmetic number, because the mean of its divisors is an integer number (29464703748).

Almost surely, 2^111311103031 is an apocalyptic number.

111311103031 is a deficient number, since it is larger than the sum of its proper divisors (6547711961).

111311103031 is an equidigital number, since it uses as much as digits as its factorization.

111311103031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547711960.

The product of its (nonzero) digits is 27, while the sum is 16.

Adding to 111311103031 its reverse (130301113111), we get a palindrome (241612216142).

The spelling of 111311103031 in words is "one hundred eleven billion, three hundred eleven million, one hundred three thousand, thirty-one".