12210121222321 has 4 divisors (see below), whose sum is σ = 13320132242544. Its totient is φ = 11100110202100.

The previous prime is 12210121222289. The next prime is 12210121222337. The reversal of 12210121222321 is 12322212101221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12210121222321 - 2⁵ = 12210121222289 is a prime.

It is a super-2 number, since 2×12210121222321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210121222292 and 12210121222301.

It is not an unprimeable number, because it can be changed into a prime (12210121232321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555005510095 + ... + 555005510116.

It is an arithmetic number, because the mean of its divisors is an integer number (3330033060636).

Almost surely, 2^{12210121222321} is an apocalyptic number.

12210121222321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210121222321 is a deficient number, since it is larger than the sum of its proper divisors (1110011020223).

12210121222321 is a wasteful number, since it uses less digits than its factorization.

12210121222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110011020222.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 12210121222321 its reverse (12322212101221), we get a palindrome (24532333323542).

The spelling of 12210121222321 in words is "twelve trillion, two hundred ten billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred twenty-one".