220202221220221 has 4 divisors (see below), whose sum is σ = 220208790336444. Its totient is φ = 220195652104000.

The previous prime is 220202221220083. The next prime is 220202221220231. The reversal of 220202221220221 is 122022122202022.

220202221220221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 109930926192025 + 110271295028196 = 10484795^2 + 10501014^2 .

It is a cyclic number.

It is not a de Polignac number, because 220202221220221 - 2¹⁵ = 220202221187453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220202221220192 and 220202221220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220202221220231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3284507830 + ... + 3284574871.

It is an arithmetic number, because the mean of its divisors is an integer number (55052197584111).

Almost surely, 2^{220202221220221} is an apocalyptic number.

It is an amenable number.

220202221220221 is a deficient number, since it is larger than the sum of its proper divisors (6569116223).

220202221220221 is an equidigital number, since it uses as much as digits as its factorization.

220202221220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6569116222.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 220202221220221 its reverse (122022122202022), we get a palindrome (342224343422243).

The spelling of 220202221220221 in words is "two hundred twenty trillion, two hundred two billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".