20111312223 has 96 divisors (see below), whose sum is σ = 32284362240. Its totient is φ = 12017652480.

The previous prime is 20111312219. The next prime is 20111312237. The reversal of 20111312223 is 32221311102.

20111312223 is a `hidden beast` number, since 20 + 111 + 312 + 223 = 666.

It is not a de Polignac number, because 20111312223 - 2² = 20111312219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20111312196 and 20111312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111312323) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41296086 + ... + 41296572.

It is an arithmetic number, because the mean of its divisors is an integer number (336295440).

Almost surely, 2^20111312223 is an apocalyptic number.

20111312223 is a deficient number, since it is larger than the sum of its proper divisors (12173050017).

20111312223 is a wasteful number, since it uses less digits than its factorization.

20111312223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20111312223 its reverse (32221311102), we get a palindrome (52332623325).

The spelling of 20111312223 in words is "twenty billion, one hundred eleven million, three hundred twelve thousand, two hundred twenty-three".