21043112023 has 8 divisors (see below), whose sum is σ = 22300802928. Its totient is φ = 19787627904.

The previous prime is 21043112011. The next prime is 21043112039. The reversal of 21043112023 is 32021134012.

It is a happy number.

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

It is not a de Polignac number, because 21043112023 - 2⁹ = 21043111511 is a prime.

It is a super-2 number, since 2×21043112023² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043112063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532036 + ... + 570217.

It is an arithmetic number, because the mean of its divisors is an integer number (2787600366).

Almost surely, 2^21043112023 is an apocalyptic number.

21043112023 is a deficient number, since it is larger than the sum of its proper divisors (1257690905).

21043112023 is a wasteful number, since it uses less digits than its factorization.

21043112023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103393.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21043112023 its reverse (32021134012), we get a palindrome (53064246035).

The spelling of 21043112023 in words is "twenty-one billion, forty-three million, one hundred twelve thousand, twenty-three".