220122122122021 has 4 divisors (see below), whose sum is σ = 251568139568032. Its totient is φ = 188676104676012.

The previous prime is 220122122121983. The next prime is 220122122122027. The reversal of 220122122122021 is 120221221221022.

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 220122122122021 - 2²⁹ = 220121585251109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220122122121983 and 220122122122001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220122122122027) 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, 15723008722995 + ... + 15723008723008.

It is an arithmetic number, because the mean of its divisors is an integer number (62892034892008).

Almost surely, 2^{220122122122021} is an apocalyptic number.

It is an amenable number.

220122122122021 is a deficient number, since it is larger than the sum of its proper divisors (31446017446011).

220122122122021 is an equidigital number, since it uses as much as digits as its factorization.

220122122122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31446017446010.

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

Adding to 220122122122021 its reverse (120221221221022), we get a palindrome (340343343343043).

Subtracting from 220122122122021 its reverse (120221221221022), we obtain a palindrome (99900900900999).

The spelling of 220122122122021 in words is "two hundred twenty trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred twenty-two thousand, twenty-one".