21223023113 has 4 divisors (see below), whose sum is σ = 21539784720. Its totient is φ = 20906261508.

The previous prime is 21223023109. The next prime is 21223023121. The reversal of 21223023113 is 31132032212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21223023113 - 2² = 21223023109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223020113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158380703 + ... + 158380836.

It is an arithmetic number, because the mean of its divisors is an integer number (5384946180).

Almost surely, 2^21223023113 is an apocalyptic number.

It is an amenable number.

21223023113 is a deficient number, since it is larger than the sum of its proper divisors (316761607).

21223023113 is an equidigital number, since it uses as much as digits as its factorization.

21223023113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316761606.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21223023113 its reverse (31132032212), we get a palindrome (52355055325).

Subtracting 21223023113 from its reverse (31132032212), we obtain a palindrome (9909009099).

The spelling of 21223023113 in words is "twenty-one billion, two hundred twenty-three million, twenty-three thousand, one hundred thirteen".