220202221211221 has 4 divisors (see below), whose sum is σ = 220867484719744. Its totient is φ = 219536957702700.

The previous prime is 220202221211191. The next prime is 220202221211227. The reversal of 220202221211221 is 122112122202022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220202221211221 - 2³³ = 220193631276629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220202221211192 and 220202221211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220202221211227) 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, 332631753765 + ... + 332631754426.

It is an arithmetic number, because the mean of its divisors is an integer number (55216871179936).

Almost surely, 2^{220202221211221} is an apocalyptic number.

It is an amenable number.

220202221211221 is a deficient number, since it is larger than the sum of its proper divisors (665263508523).

220202221211221 is an equidigital number, since it uses as much as digits as its factorization.

220202221211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665263508522.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 220202221211221 its reverse (122112122202022), we get a palindrome (342314343413243).

The spelling of 220202221211221 in words is "two hundred twenty trillion, two hundred two billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".