1111311223 has 4 divisors (see below), whose sum is σ = 1212339528. Its totient is φ = 1010282920.

The previous prime is 1111311211. The next prime is 1111311259. The reversal of 1111311223 is 3221131111.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111311223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111311197 and 1111311206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111311323) 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, 50514136 + ... + 50514157.

It is an arithmetic number, because the mean of its divisors is an integer number (303084882).

Almost surely, 2^1111311223 is an apocalyptic number.

1111311223 is a deficient number, since it is larger than the sum of its proper divisors (101028305).

1111311223 is a wasteful number, since it uses less digits than its factorization.

1111311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101028304.

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

The square root of 1111311223 is about 33336.3348765277. The cubic root of 1111311223 is about 1035.8063443354.

Adding to 1111311223 its reverse (3221131111), we get a palindrome (4332442334).

The spelling of 1111311223 in words is "one billion, one hundred eleven million, three hundred eleven thousand, two hundred twenty-three".