220211301221 has 8 divisors (see below), whose sum is σ = 221643603960. Its totient is φ = 218779374528.

The previous prime is 220211301173. The next prime is 220211301293. The reversal of 220211301221 is 122103112022.

It can be written as a sum of positive squares in 4 ways, for example, as 10276890625 + 209934410596 = 101375^2 + 458186^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220211301221 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 220211301221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211501221) 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, 1132835 + ... + 1312911.

It is an arithmetic number, because the mean of its divisors is an integer number (27705450495).

Almost surely, 2^220211301221 is an apocalyptic number.

It is an amenable number.

220211301221 is a deficient number, since it is larger than the sum of its proper divisors (1432302739).

220211301221 is a wasteful number, since it uses less digits than its factorization.

220211301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188023.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 220211301221 its reverse (122103112022), we get a palindrome (342314413243).

The spelling of 220211301221 in words is "two hundred twenty billion, two hundred eleven million, three hundred one thousand, two hundred twenty-one".