21210000022321 has 8 divisors (see below), whose sum is σ = 23367272753088. Its totient is φ = 19090909110000.

The previous prime is 21210000022319. The next prime is 21210000022349. The reversal of 21210000022321 is 12322000001212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21210000022321 - 2¹ = 21210000022319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210000022295 and 21210000022304.

It is not an unprimeable number, because it can be changed into a prime (21210000022301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9545453445 + ... + 9545455666.

It is an arithmetic number, because the mean of its divisors is an integer number (2920909094136).

Almost surely, 2^{21210000022321} is an apocalyptic number.

It is an amenable number.

21210000022321 is a deficient number, since it is larger than the sum of its proper divisors (2157272730767).

21210000022321 is a wasteful number, since it uses less digits than its factorization.

21210000022321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19090909223.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21210000022321 its reverse (12322000001212), we get a palindrome (33532000023533).

The spelling of 21210000022321 in words is "twenty-one trillion, two hundred ten billion, twenty-two thousand, three hundred twenty-one".