111021113 has 6 divisors (see below), whose sum is σ = 129147066. Its totient is φ = 95160912.

The previous prime is 111021083. The next prime is 111021121. The reversal of 111021113 is 311120111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 110838784 + 182329 = 10528^2 + 427^2 .

It is not a de Polignac number, because 111021113 - 2¹⁸ = 110758969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111021094 and 111021103.

It is not an unprimeable number, because it can be changed into a prime (111011113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1132820 + ... + 1132917.

It is an arithmetic number, because the mean of its divisors is an integer number (21524511).

Almost surely, 2^111021113 is an apocalyptic number.

It is an amenable number.

111021113 is a deficient number, since it is larger than the sum of its proper divisors (18125953).

111021113 is an equidigital number, since it uses as much as digits as its factorization.

111021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265751 (or 2265744 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111021113 is about 10536.6556838496. The cubic root of 111021113 is about 480.6200219711.

Adding to 111021113 its reverse (311120111), we get a palindrome (422141224).

The spelling of 111021113 in words is "one hundred eleven million, twenty-one thousand, one hundred thirteen".