12210222021 has 4 divisors (see below), whose sum is σ = 16280296032. Its totient is φ = 8140148012.

The previous prime is 12210222019. The next prime is 12210222023. The reversal of 12210222021 is 12022201221.

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 an interprime number because it is at equal distance from previous prime (12210222019) and next prime (12210222023).

It is a cyclic number.

It is not a de Polignac number, because 12210222021 - 2¹ = 12210222019 is a prime.

It is a super-2 number, since 2×12210222021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035037001 + ... + 2035037006.

It is an arithmetic number, because the mean of its divisors is an integer number (4070074008).

Almost surely, 2^12210222021 is an apocalyptic number.

It is an amenable number.

12210222021 is a deficient number, since it is larger than the sum of its proper divisors (4070074011).

12210222021 is an equidigital number, since it uses as much as digits as its factorization.

12210222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070074010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12210222021 its reverse (12022201221), we get a palindrome (24232423242).

The spelling of 12210222021 in words is "twelve billion, two hundred ten million, two hundred twenty-two thousand, twenty-one".