220202211221221 has 4 divisors (see below), whose sum is σ = 220639988977632. Its totient is φ = 219764433464812.

The previous prime is 220202211221197. The next prime is 220202211221257. The reversal of 220202211221221 is 122122112202022.

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 220202211221221 - 2²³ = 220202202832613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220202211221192 and 220202211221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220202211621221) 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, 218888877451 + ... + 218888878456.

It is an arithmetic number, because the mean of its divisors is an integer number (55159997244408).

Almost surely, 2^{220202211221221} is an apocalyptic number.

It is an amenable number.

220202211221221 is a deficient number, since it is larger than the sum of its proper divisors (437777756411).

220202211221221 is an equidigital number, since it uses as much as digits as its factorization.

220202211221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437777756410.

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

Adding to 220202211221221 its reverse (122122112202022), we get a palindrome (342324323423243).

The spelling of 220202211221221 in words is "two hundred twenty trillion, two hundred two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".