12212322221 has 8 divisors (see below), whose sum is σ = 13605992064. Its totient is φ = 10865895520.

The previous prime is 12212322217. The next prime is 12212322223. The reversal of 12212322221 is 12222321221.

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 12212322221 - 2² = 12212322217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212322193 and 12212322202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212322223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11810240 + ... + 11811273.

It is an arithmetic number, because the mean of its divisors is an integer number (1700749008).

Almost surely, 2^12212322221 is an apocalyptic number.

12212322221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212322221 is a deficient number, since it is larger than the sum of its proper divisors (1393669843).

12212322221 is a wasteful number, since it uses less digits than its factorization.

12212322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23621571.

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

Adding to 12212322221 its reverse (12222321221), we get a palindrome (24434643442).

It can be divided in two parts, 12212 and 322221, that added together give a palindrome (334433).

The spelling of 12212322221 in words is "twelve billion, two hundred twelve million, three hundred twenty-two thousand, two hundred twenty-one".