21230332211 has 6 divisors (see below), whose sum is σ = 23335819836. Its totient is φ = 19300301900.

The previous prime is 21230332181. The next prime is 21230332289. The reversal of 21230332211 is 11223303212.

It is not a de Polignac number, because 21230332211 - 2⁶ = 21230332147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230332111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87728525 + ... + 87728766.

It is an arithmetic number, because the mean of its divisors is an integer number (3889303306).

Almost surely, 2^21230332211 is an apocalyptic number.

21230332211 is a deficient number, since it is larger than the sum of its proper divisors (2105487625).

21230332211 is a wasteful number, since it uses less digits than its factorization.

21230332211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175457313 (or 175457302 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21230332211 its reverse (11223303212), we get a palindrome (32453635423).

The spelling of 21230332211 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-two thousand, two hundred eleven".