223121044231123 has 4 divisors (see below), whose sum is σ = 223131721432680. Its totient is φ = 223110367029568.

The previous prime is 223121044231117. The next prime is 223121044231147. The reversal of 223121044231123 is 321132440121322.

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-223121044231123 is a prime.

It is a super-3 number, since 3×223121044231123³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223121044231193) 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, 5338569433 + ... + 5338611226.

It is an arithmetic number, because the mean of its divisors is an integer number (55782930358170).

Almost surely, 2^{223121044231123} is an apocalyptic number.

223121044231123 is a deficient number, since it is larger than the sum of its proper divisors (10677201557).

223121044231123 is a wasteful number, since it uses less digits than its factorization.

223121044231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10677201556.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 223121044231123 its reverse (321132440121322), we get a palindrome (544253484352445).

The spelling of 223121044231123 in words is "two hundred twenty-three trillion, one hundred twenty-one billion, forty-four million, two hundred thirty-one thousand, one hundred twenty-three".