21333111013 has 8 divisors (see below), whose sum is σ = 21792210048. Its totient is φ = 20874228864.

The previous prime is 21333110999. The next prime is 21333111047. The reversal of 21333111013 is 31011133312.

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-21333111013 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 (21333111073) 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, 153045 + ... + 257077.

It is an arithmetic number, because the mean of its divisors is an integer number (2724026256).

Almost surely, 2^21333111013 is an apocalyptic number.

It is an amenable number.

21333111013 is a deficient number, since it is larger than the sum of its proper divisors (459099035).

21333111013 is a wasteful number, since it uses less digits than its factorization.

21333111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108443.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21333111013 its reverse (31011133312), we get a palindrome (52344244325).

The spelling of 21333111013 in words is "twenty-one billion, three hundred thirty-three million, one hundred eleven thousand, thirteen".