21424113321 has 8 divisors (see below), whose sum is σ = 30762829440. Its totient is φ = 13184069712.

The previous prime is 21424113317. The next prime is 21424113343. The reversal of 21424113321 is 12331142412.

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

It is not a de Polignac number, because 21424113321 - 2² = 21424113317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21424113291 and 21424113300.

It is not an unprimeable number, because it can be changed into a prime (21424113121) 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 7 ways as a sum of consecutive naturals, for example, 274668081 + ... + 274668158.

It is an arithmetic number, because the mean of its divisors is an integer number (3845353680).

Almost surely, 2^21424113321 is an apocalyptic number.

It is an amenable number.

21424113321 is a deficient number, since it is larger than the sum of its proper divisors (9338716119).

21424113321 is a wasteful number, since it uses less digits than its factorization.

21424113321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549336255.

The product of its digits is 1152, while the sum is 24.

Adding to 21424113321 its reverse (12331142412), we get a palindrome (33755255733).

The spelling of 21424113321 in words is "twenty-one billion, four hundred twenty-four million, one hundred thirteen thousand, three hundred twenty-one".