23111221143 has 8 divisors (see below), whose sum is σ = 30816028800. Its totient is φ = 15406947128.

The previous prime is 23111221141. The next prime is 23111221201. The reversal of 23111221143 is 34112211132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23111221143 - 2¹ = 23111221141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23111221141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18123 + ... + 215756.

It is an arithmetic number, because the mean of its divisors is an integer number (3852003600).

Almost surely, 2^23111221143 is an apocalyptic number.

23111221143 is a deficient number, since it is larger than the sum of its proper divisors (7704807657).

23111221143 is a wasteful number, since it uses less digits than its factorization.

23111221143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266821.

The product of its digits is 288, while the sum is 21.

Adding to 23111221143 its reverse (34112211132), we get a palindrome (57223432275).

The spelling of 23111221143 in words is "twenty-three billion, one hundred eleven million, two hundred twenty-one thousand, one hundred forty-three".