11121311223 has 36 divisors (see below), whose sum is σ = 18134540424. Its totient is φ = 6557997600.

The previous prime is 11121311207. The next prime is 11121311231. The reversal of 11121311223 is 32211312111.

11121311223 is a `hidden beast` number, since 11 + 121 + 311 + 223 = 666.

It is not a de Polignac number, because 11121311223 - 2⁴ = 11121311207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121311196 and 11121311205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121311203) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 97713 + ... + 178298.

It is an arithmetic number, because the mean of its divisors is an integer number (503737234).

Almost surely, 2^11121311223 is an apocalyptic number.

11121311223 is a deficient number, since it is larger than the sum of its proper divisors (7013229201).

11121311223 is a wasteful number, since it uses less digits than its factorization.

11121311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276076 (or 276062 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11121311223 its reverse (32211312111), we get a palindrome (43332623334).

The spelling of 11121311223 in words is "eleven billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty-three".