21421113326 has 8 divisors (see below), whose sum is σ = 32273219880. Its totient is φ = 10663373368.

The previous prime is 21421113317. The next prime is 21421113341. The reversal of 21421113326 is 62331112412.

It is a happy number.

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

It is a super-2 number, since 2×21421113326² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21421113295 and 21421113304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23591081 + ... + 23591988.

It is an arithmetic number, because the mean of its divisors is an integer number (4034152485).

Almost surely, 2^21421113326 is an apocalyptic number.

21421113326 is a deficient number, since it is larger than the sum of its proper divisors (10852106554).

21421113326 is a wasteful number, since it uses less digits than its factorization.

21421113326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47183298.

The product of its digits is 1728, while the sum is 26.

Adding to 21421113326 its reverse (62331112412), we get a palindrome (83752225738).

The spelling of 21421113326 in words is "twenty-one billion, four hundred twenty-one million, one hundred thirteen thousand, three hundred twenty-six".