111312011 has 4 divisors (see below), whose sum is σ = 111811392. Its totient is φ = 110812632.

The previous prime is 111311987. The next prime is 111312023. The reversal of 111312011 is 110213111.

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: 110213111 = 1823 ⋅60457.

It is a cyclic number.

It is not a de Polignac number, because 111312011 - 2¹⁸ = 111049867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111311983 and 111312001.

It is not an unprimeable number, because it can be changed into a prime (111312511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249356 + ... + 249801.

It is an arithmetic number, because the mean of its divisors is an integer number (27952848).

Almost surely, 2^111312011 is an apocalyptic number.

111312011 is a deficient number, since it is larger than the sum of its proper divisors (499381).

111312011 is an equidigital number, since it uses as much as digits as its factorization.

111312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499380.

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

The square root of 111312011 is about 10550.4507486647. The cubic root of 111312011 is about 481.0394300919.

Adding to 111312011 its reverse (110213111), we get a palindrome (221525122).

The spelling of 111312011 in words is "one hundred eleven million, three hundred twelve thousand, eleven".