12422021 has 4 divisors (see below), whose sum is σ = 12433344. Its totient is φ = 12410700.

The previous prime is 12422009. The next prime is 12422023. The reversal of 12422021 is 12022421.

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 12422021 - 2¹⁴ = 12405637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12421987 and 12422005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12422023) 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, 3815 + ... + 6276.

It is an arithmetic number, because the mean of its divisors is an integer number (3108336).

Almost surely, 2^12422021 is an apocalyptic number.

It is an amenable number.

12422021 is a deficient number, since it is larger than the sum of its proper divisors (11323).

12422021 is a wasteful number, since it uses less digits than its factorization.

12422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11322.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 12422021 is about 3524.4887572526. The cubic root of 12422021 is about 231.5958393860.

Adding to 12422021 its reverse (12022421), we get a palindrome (24444442).

The spelling of 12422021 in words is "twelve million, four hundred twenty-two thousand, twenty-one".