21333333312 has 112 divisors (see below), whose sum is σ = 64411270720. Its totient is φ = 6918898176.

The previous prime is 21333333227. The next prime is 21333333317.

21333333312 is a `hidden beast` number, since 2 + 13 + 3 + 3 + 333 + 312 = 666.

21333333312 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21333333312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333333317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102898 + ... + 230769.

Almost surely, 2^21333333312 is an apocalyptic number.

It is an amenable number.

21333333312 is an abundant number, since it is smaller than the sum of its proper divisors (43077937408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21333333312 is a wasteful number, since it uses less digits than its factorization.

21333333312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333725 (or 333709 counting only the distinct ones).

The product of its digits is 8748, while the sum is 27.

It can be divided in two parts, 21 and 333333312, that added together give a palindrome (333333333).

The spelling of 21333333312 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirty-three thousand, three hundred twelve".