201123311223 has 16 divisors (see below), whose sum is σ = 269062466400. Its totient is φ = 133633718400.

The previous prime is 201123311183. The next prime is 201123311293. The reversal of 201123311223 is 322113321102.

It is not a de Polignac number, because 201123311223 - 2¹⁸ = 201123049079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201123311223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201123311293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1452033 + ... + 1584501.

It is an arithmetic number, because the mean of its divisors is an integer number (16816404150).

Almost surely, 2^201123311223 is an apocalyptic number.

201123311223 is a deficient number, since it is larger than the sum of its proper divisors (67939155177).

201123311223 is a wasteful number, since it uses less digits than its factorization.

201123311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134162.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 201123311223 its reverse (322113321102), we get a palindrome (523236632325).

The spelling of 201123311223 in words is "two hundred one billion, one hundred twenty-three million, three hundred eleven thousand, two hundred twenty-three".