1322212221 has 16 divisors (see below), whose sum is σ = 2136909120. Its totient is φ = 801340560.

The previous prime is 1322212219. The next prime is 1322212231. The reversal of 1322212221 is 1222122231.

It is not a de Polignac number, because 1322212221 - 2¹ = 1322212219 is a prime.

It is a super-3 number, since 3×1322212221³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1322212194 and 1322212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322212231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2225650 + ... + 2226243.

It is an arithmetic number, because the mean of its divisors is an integer number (133556820).

Almost surely, 2^1322212221 is an apocalyptic number.

1322212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1322212221 is a deficient number, since it is larger than the sum of its proper divisors (814696899).

1322212221 is a wasteful number, since it uses less digits than its factorization.

1322212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451913 (or 4451907 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1322212221 is about 36362.2361936116. The cubic root of 1322212221 is about 1097.5737767594.

Adding to 1322212221 its reverse (1222122231), we get a palindrome (2544334452).

The spelling of 1322212221 in words is "one billion, three hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".