21232112311 has 16 divisors (see below), whose sum is σ = 22626682560. Its totient is φ = 19854131200.

The previous prime is 21232112309. The next prime is 21232112323. The reversal of 21232112311 is 11321123212.

It is a cyclic number.

It is not a de Polignac number, because 21232112311 - 2¹ = 21232112309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232112351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1745910 + ... + 1758028.

It is an arithmetic number, because the mean of its divisors is an integer number (1414167660).

Almost surely, 2^21232112311 is an apocalyptic number.

21232112311 is a deficient number, since it is larger than the sum of its proper divisors (1394570249).

21232112311 is a wasteful number, since it uses less digits than its factorization.

21232112311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12794.

The product of its digits is 144, while the sum is 19.

Adding to 21232112311 its reverse (11321123212), we get a palindrome (32553235523).

The spelling of 21232112311 in words is "twenty-one billion, two hundred thirty-two million, one hundred twelve thousand, three hundred eleven".