21323121334 has 8 divisors (see below), whose sum is σ = 33087602160. Its totient is φ = 10293920616.

The previous prime is 21323121331. The next prime is 21323121361. The reversal of 21323121334 is 43312132312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21323121299 and 21323121308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323121331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 183819954 + ... + 183820069.

It is an arithmetic number, because the mean of its divisors is an integer number (4135950270).

Almost surely, 2^21323121334 is an apocalyptic number.

21323121334 is a deficient number, since it is larger than the sum of its proper divisors (11764480826).

21323121334 is a wasteful number, since it uses less digits than its factorization.

21323121334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367640054.

The product of its digits is 2592, while the sum is 25.

Adding to 21323121334 its reverse (43312132312), we get a palindrome (64635253646).

The spelling of 21323121334 in words is "twenty-one billion, three hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty-four".