21314421223 has 4 divisors (see below), whose sum is σ = 21716580168. Its totient is φ = 20912262280.

The previous prime is 21314421209. The next prime is 21314421251. The reversal of 21314421223 is 32212441312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21314421223 - 2³³ = 12724486631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314421203) 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, 201079393 + ... + 201079498.

It is an arithmetic number, because the mean of its divisors is an integer number (5429145042).

Almost surely, 2^21314421223 is an apocalyptic number.

21314421223 is a deficient number, since it is larger than the sum of its proper divisors (402158945).

21314421223 is an equidigital number, since it uses as much as digits as its factorization.

21314421223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402158944.

The product of its digits is 2304, while the sum is 25.

Adding to 21314421223 its reverse (32212441312), we get a palindrome (53526862535).

The spelling of 21314421223 in words is "twenty-one billion, three hundred fourteen million, four hundred twenty-one thousand, two hundred twenty-three".