22221302441221 has 8 divisors (see below), whose sum is σ = 23930672990840. Its totient is φ = 20511937547712.

The previous prime is 22221302441147. The next prime is 22221302441237. The reversal of 22221302441221 is 12214420312222.

It can be written as a sum of positive squares in 4 ways, for example, as 7404461400996 + 14816841040225 = 2721114^2 + 3849265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22221302441221 - 2¹¹ = 22221302439173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221302441221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221302441321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10403731 + ... + 12356383.

It is an arithmetic number, because the mean of its divisors is an integer number (2991334123855).

Almost surely, 2^{22221302441221} is an apocalyptic number.

It is an amenable number.

22221302441221 is a deficient number, since it is larger than the sum of its proper divisors (1709370549619).

22221302441221 is a wasteful number, since it uses less digits than its factorization.

22221302441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828055.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 22221302441221 its reverse (12214420312222), we get a palindrome (34435722753443).

The spelling of 22221302441221 in words is "twenty-two trillion, two hundred twenty-one billion, three hundred two million, four hundred forty-one thousand, two hundred twenty-one".