220020221211121 has 4 divisors (see below), whose sum is σ = 220387533768000. Its totient is φ = 219652908654244.

The previous prime is 220020221211023. The next prime is 220020221211127. The reversal of 220020221211121 is 121112122020022.

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 a de Polignac number, because none of the positive numbers 2^k-220020221211121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220020221211127) 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, 183656277541 + ... + 183656278738.

It is an arithmetic number, because the mean of its divisors is an integer number (55096883442000).

Almost surely, 2^{220020221211121} is an apocalyptic number.

It is an amenable number.

220020221211121 is a deficient number, since it is larger than the sum of its proper divisors (367312556879).

220020221211121 is an equidigital number, since it uses as much as digits as its factorization.

220020221211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367312556878.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220020221211121 its reverse (121112122020022), we get a palindrome (341132343231143).

The spelling of 220020221211121 in words is "two hundred twenty trillion, twenty billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".