220120002212221 has 4 divisors (see below), whose sum is σ = 220127307190492. Its totient is φ = 220112697233952.

The previous prime is 220120002212219. The next prime is 220120002212303. The reversal of 220120002212221 is 122212200021022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76042951908121 + 144077050304100 = 8720261^2 + 12003210^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120002212221 - 2¹ = 220120002212219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120002212921) 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 3 ways as a sum of consecutive naturals, for example, 3652443936 + ... + 3652504201.

It is an arithmetic number, because the mean of its divisors is an integer number (55031826797623).

Almost surely, 2^{220120002212221} is an apocalyptic number.

It is an amenable number.

220120002212221 is a deficient number, since it is larger than the sum of its proper divisors (7304978271).

220120002212221 is an equidigital number, since it uses as much as digits as its factorization.

220120002212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304978270.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 220120002212221 its reverse (122212200021022), we get a palindrome (342332202233243).

The spelling of 220120002212221 in words is "two hundred twenty trillion, one hundred twenty billion, two million, two hundred twelve thousand, two hundred twenty-one".