21113133233 has 8 divisors (see below), whose sum is σ = 21878398080. Its totient is φ = 20350350160.

The previous prime is 21113133211. The next prime is 21113133277. The reversal of 21113133233 is 33233131112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113133233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113133199 and 21113133208.

It is not an unprimeable number, because it can be changed into a prime (21113333233) 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 7 ways as a sum of consecutive naturals, for example, 603113 + ... + 637158.

It is an arithmetic number, because the mean of its divisors is an integer number (2734799760).

Almost surely, 2^21113133233 is an apocalyptic number.

It is an amenable number.

21113133233 is a deficient number, since it is larger than the sum of its proper divisors (765264847).

21113133233 is a wasteful number, since it uses less digits than its factorization.

21113133233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240887.

The product of its digits is 972, while the sum is 23.

Adding to 21113133233 its reverse (33233131112), we get a palindrome (54346264345).

The spelling of 21113133233 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-three thousand, two hundred thirty-three".