111310221031 has 4 divisors (see below), whose sum is σ = 111312239632. Its totient is φ = 111308202432.

The previous prime is 111310220941. The next prime is 111310221041. The reversal of 111310221031 is 130122013111.

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: 130122013111 = 1277 ⋅101896643.

It is a cyclic number.

It is not a de Polignac number, because 111310221031 - 2⁹ = 111310220519 is a prime.

It is a super-2 number, since 2×111310221031² (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 = 111310220996 and 111310221014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111310221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924195 + ... + 1037668.

It is an arithmetic number, because the mean of its divisors is an integer number (27828059908).

Almost surely, 2^111310221031 is an apocalyptic number.

111310221031 is a deficient number, since it is larger than the sum of its proper divisors (2018601).

111310221031 is an equidigital number, since it uses as much as digits as its factorization.

111310221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018600.

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

Adding to 111310221031 its reverse (130122013111), we get a palindrome (241432234142).

The spelling of 111310221031 in words is "one hundred eleven billion, three hundred ten million, two hundred twenty-one thousand, thirty-one".