23121044443 has 16 divisors (see below), whose sum is σ = 26650378240. Its totient is φ = 19648845216.

The previous prime is 23121044417. The next prime is 23121044467. The reversal of 23121044443 is 34444012132.

It is not a de Polignac number, because 23121044443 - 2¹⁷ = 23120913371 is a prime.

It is a super-2 number, since 2×23121044443² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23101044443) 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 15 ways as a sum of consecutive naturals, for example, 486118 + ... + 531556.

It is an arithmetic number, because the mean of its divisors is an integer number (1665648640).

Almost surely, 2^23121044443 is an apocalyptic number.

23121044443 is a deficient number, since it is larger than the sum of its proper divisors (3529333797).

23121044443 is a wasteful number, since it uses less digits than its factorization.

23121044443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46066.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 23121044443 its reverse (34444012132), we get a palindrome (57565056575).

It can be divided in two parts, 231210 and 44443, that added together give a triangular number (275653 = T₇₄₂).

The spelling of 23121044443 in words is "twenty-three billion, one hundred twenty-one million, forty-four thousand, four hundred forty-three".