21302231211 has 12 divisors (see below), whose sum is σ = 31057459992. Its totient is φ = 14068762656.

The previous prime is 21302231189. The next prime is 21302231227. The reversal of 21302231211 is 11213220312.

It is not a de Polignac number, because 21302231211 - 2⁵ = 21302231179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21302231711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11059386 + ... + 11061311.

It is an arithmetic number, because the mean of its divisors is an integer number (2588121666).

Almost surely, 2^21302231211 is an apocalyptic number.

21302231211 is a deficient number, since it is larger than the sum of its proper divisors (9755228781).

21302231211 is a wasteful number, since it uses less digits than its factorization.

21302231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22120810 (or 22120807 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21302231211 its reverse (11213220312), we get a palindrome (32515451523).

The spelling of 21302231211 in words is "twenty-one billion, three hundred two million, two hundred thirty-one thousand, two hundred eleven".