220122122221 has 4 divisors (see below), whose sum is σ = 220125688672. Its totient is φ = 220118555772.

The previous prime is 220122122191. The next prime is 220122122243. The reversal of 220122122221 is 122221221022.

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 220122122221 - 2¹⁷ = 220121991149 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 (220122182221) 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, 1688985 + ... + 1814638.

It is an arithmetic number, because the mean of its divisors is an integer number (55031422168).

Almost surely, 2^220122122221 is an apocalyptic number.

It is an amenable number.

220122122221 is a deficient number, since it is larger than the sum of its proper divisors (3566451).

220122122221 is an equidigital number, since it uses as much as digits as its factorization.

220122122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566450.

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

Adding to 220122122221 its reverse (122221221022), we get a palindrome (342343343243).

It can be divided in two parts, 220122 and 122221, that multiplied together give a palindrome (26903530962).

The spelling of 220122122221 in words is "two hundred twenty billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".