21322120317 has 8 divisors (see below), whose sum is σ = 28448166624. Its totient is φ = 14205410448.

The previous prime is 21322120301. The next prime is 21322120343. The reversal of 21322120317 is 71302122312.

It is a happy number.

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

It is not a de Polignac number, because 21322120317 - 2⁴ = 21322120301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322120357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2328778 + ... + 2337915.

It is an arithmetic number, because the mean of its divisors is an integer number (3556020828).

Almost surely, 2^21322120317 is an apocalyptic number.

It is an amenable number.

21322120317 is a deficient number, since it is larger than the sum of its proper divisors (7126046307).

21322120317 is a wasteful number, since it uses less digits than its factorization.

21322120317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668219.

The product of its (nonzero) digits is 1008, while the sum is 24.

Adding to 21322120317 its reverse (71302122312), we get a palindrome (92624242629).

The spelling of 21322120317 in words is "twenty-one billion, three hundred twenty-two million, one hundred twenty thousand, three hundred seventeen".