220211220101221 has 4 divisors (see below), whose sum is σ = 220317040007244. Its totient is φ = 220105400195200.

The previous prime is 220211220101203. The next prime is 220211220101227. The reversal of 220211220101221 is 122101022112022.

220211220101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163280120728321 + 56931099372900 = 12778111^2 + 7545270^2 .

It is a cyclic number.

It is not a de Polignac number, because 220211220101221 - 2⁹ = 220211220100709 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 (220211220101227) 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, 52909949890 + ... + 52909954051.

It is an arithmetic number, because the mean of its divisors is an integer number (55079260001811).

Almost surely, 2^{220211220101221} is an apocalyptic number.

It is an amenable number.

220211220101221 is a deficient number, since it is larger than the sum of its proper divisors (105819906023).

220211220101221 is a wasteful number, since it uses less digits than its factorization.

220211220101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105819906022.

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

Adding to 220211220101221 its reverse (122101022112022), we get a palindrome (342312242213243).

The spelling of 220211220101221 in words is "two hundred twenty trillion, two hundred eleven billion, two hundred twenty million, one hundred one thousand, two hundred twenty-one".