21233122311 has 16 divisors (see below), whose sum is σ = 28796169600. Its totient is φ = 13912836768.

The previous prime is 21233122301. The next prime is 21233122319. The reversal of 21233122311 is 11322133212.

It is not a de Polignac number, because 21233122311 - 2⁵ = 21233122279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233122319) 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 15 ways as a sum of consecutive naturals, for example, 1429320 + ... + 1444098.

It is an arithmetic number, because the mean of its divisors is an integer number (1799760600).

Almost surely, 2^21233122311 is an apocalyptic number.

21233122311 is a deficient number, since it is larger than the sum of its proper divisors (7563047289).

21233122311 is a wasteful number, since it uses less digits than its factorization.

21233122311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22958.

The product of its digits is 432, while the sum is 21.

Adding to 21233122311 its reverse (11322133212), we get a palindrome (32555255523).

The spelling of 21233122311 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-two thousand, three hundred eleven".