20110231223 has 4 divisors (see below), whose sum is σ = 20110515360. Its totient is φ = 20109947088.

The previous prime is 20110231151. The next prime is 20110231259. The reversal of 20110231223 is 32213201102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20110231223 - 2³² = 15815263927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110231423) 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, 58211 + ... + 208827.

It is an arithmetic number, because the mean of its divisors is an integer number (5027628840).

Almost surely, 2^20110231223 is an apocalyptic number.

20110231223 is a deficient number, since it is larger than the sum of its proper divisors (284137).

20110231223 is a wasteful number, since it uses less digits than its factorization.

20110231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284136.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20110231223 its reverse (32213201102), we get a palindrome (52323432325).

The spelling of 20110231223 in words is "twenty billion, one hundred ten million, two hundred thirty-one thousand, two hundred twenty-three".