21233221113 has 32 divisors (see below), whose sum is σ = 30796416000. Its totient is φ = 12935393856.

The previous prime is 21233221063. The next prime is 21233221123. The reversal of 21233221113 is 31112233212.

It is not a de Polignac number, because 21233221113 - 2⁸ = 21233220857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21233221113.

It is not an unprimeable number, because it can be changed into a prime (21233221123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1577988 + ... + 1591386.

It is an arithmetic number, because the mean of its divisors is an integer number (962388000).

Almost surely, 2^21233221113 is an apocalyptic number.

It is an amenable number.

21233221113 is a deficient number, since it is larger than the sum of its proper divisors (9563194887).

21233221113 is a wasteful number, since it uses less digits than its factorization.

21233221113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13821.

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

Adding to 21233221113 its reverse (31112233212), we get a palindrome (52345454325).

The spelling of 21233221113 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty-one thousand, one hundred thirteen".