22201111011221 has 8 divisors (see below), whose sum is σ = 22234413399384. Its totient is φ = 22167809556480.

The previous prime is 22201111011133. The next prime is 22201111011227. The reversal of 22201111011221 is 12211011110222.

It can be written as a sum of positive squares in 4 ways, for example, as 3748192800625 + 18452918210596 = 1936025^2 + 4295686^2 .

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 22201111011221 - 2¹⁴ = 22201110994837 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 22201111011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201111011227) 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, 58389095 + ... + 58768091.

It is an arithmetic number, because the mean of its divisors is an integer number (2779301674923).

Almost surely, 2^{22201111011221} is an apocalyptic number.

It is an amenable number.

22201111011221 is a deficient number, since it is larger than the sum of its proper divisors (33302388163).

22201111011221 is an equidigital number, since it uses as much as digits as its factorization.

22201111011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466711.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22201111011221 its reverse (12211011110222), we get a palindrome (34412122121443).

Subtracting from 22201111011221 its reverse (12211011110222), we obtain a palindrome (9990099900999).

The spelling of 22201111011221 in words is "twenty-two trillion, two hundred one billion, one hundred eleven million, eleven thousand, two hundred twenty-one".