12422021321 has 4 divisors (see below), whose sum is σ = 12423802644. Its totient is φ = 12420240000.

The previous prime is 12422021291. The next prime is 12422021387. The reversal of 12422021321 is 12312022421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3909375625 + 8512645696 = 62525^2 + 92264^2 .

It is a cyclic number.

It is not a de Polignac number, because 12422021321 - 2²⁶ = 12354912457 is a prime.

It is a super-2 number, since 2×12422021321² (a number of 21 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 = 12422021293 and 12422021302.

It is not an unprimeable number, because it can be changed into a prime (12422021221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880160 + ... + 894161.

It is an arithmetic number, because the mean of its divisors is an integer number (3105950661).

Almost surely, 2^12422021321 is an apocalyptic number.

It is an amenable number.

12422021321 is a deficient number, since it is larger than the sum of its proper divisors (1781323).

12422021321 is an equidigital number, since it uses as much as digits as its factorization.

12422021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781322.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12422021321 its reverse (12312022421), we get a palindrome (24734043742).

It can be divided in two parts, 124220 and 21321, that added together give a palindrome (145541).

The spelling of 12422021321 in words is "twelve billion, four hundred twenty-two million, twenty-one thousand, three hundred twenty-one".