21333213112 has 32 divisors (see below), whose sum is σ = 40800614400. Its totient is φ = 10455074784.

The previous prime is 21333213101. The next prime is 21333213127. The reversal of 21333213112 is 21131233312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42162 + ... + 210817.

It is an arithmetic number, because the mean of its divisors is an integer number (1275019200).

Almost surely, 2^21333213112 is an apocalyptic number.

It is an amenable number.

21333213112 is a deficient number, since it is larger than the sum of its proper divisors (19467401288).

21333213112 is a wasteful number, since it uses less digits than its factorization.

21333213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253195 (or 253191 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 21333213112 its reverse (21131233312), we get a palindrome (42464446424).

The spelling of 21333213112 in words is "twenty-one billion, three hundred thirty-three million, two hundred thirteen thousand, one hundred twelve".