21113333333 has 8 divisors (see below), whose sum is σ = 21937603680. Its totient is φ = 20295478000.

The previous prime is 21113333303. The next prime is 21113333341. The reversal of 21113333333 is 33333331112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21113333333 - 2¹⁴ = 21113316949 is a prime.

It is a Duffinian number.

21113333333 is a modest number, since divided by 333333 gives 21113 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113333303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1597043 + ... + 1610208.

It is an arithmetic number, because the mean of its divisors is an integer number (2742200460).

Almost surely, 2^21113333333 is an apocalyptic number.

It is an amenable number.

21113333333 is a deficient number, since it is larger than the sum of its proper divisors (824270347).

21113333333 is a wasteful number, since it uses less digits than its factorization.

21113333333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207507.

The product of its digits is 4374, while the sum is 26.

Adding to 21113333333 its reverse (33333331112), we get a palindrome (54446664445).

The spelling of 21113333333 in words is "twenty-one billion, one hundred thirteen million, three hundred thirty-three thousand, three hundred thirty-three".