21421224323 has 8 divisors (see below), whose sum is σ = 22685466528. Its totient is φ = 20157445504.

The previous prime is 21421224311. The next prime is 21421224343. The reversal of 21421224323 is 32342212412.

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 21421224323 - 2³⁰ = 20347482499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21421224292 and 21421224301.

It is not an unprimeable number, because it can be changed into a prime (21421224343) 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, 18311 + ... + 207792.

It is an arithmetic number, because the mean of its divisors is an integer number (2835683316).

Almost surely, 2^21421224323 is an apocalyptic number.

21421224323 is a deficient number, since it is larger than the sum of its proper divisors (1264242205).

21421224323 is a wasteful number, since it uses less digits than its factorization.

21421224323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231693.

The product of its digits is 4608, while the sum is 26.

Adding to 21421224323 its reverse (32342212412), we get a palindrome (53763436735).

The spelling of 21421224323 in words is "twenty-one billion, four hundred twenty-one million, two hundred twenty-four thousand, three hundred twenty-three".