21312133334 has 24 divisors (see below), whose sum is σ = 34101609120. Its totient is φ = 9987211136.

The previous prime is 21312133303. The next prime is 21312133343. The reversal of 21312133334 is 43333121312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61004 + ... + 215280.

It is an arithmetic number, because the mean of its divisors is an integer number (1420900380).

Almost surely, 2^21312133334 is an apocalyptic number.

21312133334 is a deficient number, since it is larger than the sum of its proper divisors (12789475786).

21312133334 is a wasteful number, since it uses less digits than its factorization.

21312133334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154552 (or 154535 counting only the distinct ones).

The product of its digits is 3888, while the sum is 26.

Adding to 21312133334 its reverse (43333121312), we get a palindrome (64645254646).

The spelling of 21312133334 in words is "twenty-one billion, three hundred twelve million, one hundred thirty-three thousand, three hundred thirty-four".