220222120021221 has 16 divisors (see below), whose sum is σ = 294728605928064. Its totient is φ = 146266207156224.

The previous prime is 220222120021181. The next prime is 220222120021243. The reversal of 220222120021221 is 122120021222022.

It is not a de Polignac number, because 220222120021221 - 2⁹ = 220222120020709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222520021221) 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 15 ways as a sum of consecutive naturals, for example, 126227916 + ... + 127960661.

It is an arithmetic number, because the mean of its divisors is an integer number (18420537870504).

Almost surely, 2^{220222120021221} is an apocalyptic number.

It is an amenable number.

220222120021221 is a deficient number, since it is larger than the sum of its proper divisors (74506485906843).

220222120021221 is a wasteful number, since it uses less digits than its factorization.

220222120021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254189660.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 220222120021221 its reverse (122120021222022), we get a palindrome (342342141243243).

The spelling of 220222120021221 in words is "two hundred twenty trillion, two hundred twenty-two billion, one hundred twenty million, twenty-one thousand, two hundred twenty-one".