21424132211 has 4 divisors (see below), whose sum is σ = 21725880624. Its totient is φ = 21122383800.

The previous prime is 21424132201. The next prime is 21424132259. The reversal of 21424132211 is 11223142412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21424132211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21424132201) 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, 150874100 + ... + 150874241.

It is an arithmetic number, because the mean of its divisors is an integer number (5431470156).

Almost surely, 2^21424132211 is an apocalyptic number.

21424132211 is a deficient number, since it is larger than the sum of its proper divisors (301748413).

21424132211 is an equidigital number, since it uses as much as digits as its factorization.

21424132211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301748412.

The product of its digits is 768, while the sum is 23.

Adding to 21424132211 its reverse (11223142412), we get a palindrome (32647274623).

The spelling of 21424132211 in words is "twenty-one billion, four hundred twenty-four million, one hundred thirty-two thousand, two hundred eleven".