220100022101221 has 32 divisors (see below), whose sum is σ = 231119607398400. Its totient is φ = 209384860225920.

The previous prime is 220100022101143. The next prime is 220100022101231. The reversal of 220100022101221 is 122101220001022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 220100022101221 - 2¹⁷ = 220100021970149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100022101195 and 220100022101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100022101231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 571164816 + ... + 571550038.

It is an arithmetic number, because the mean of its divisors is an integer number (7222487731200).

Almost surely, 2^{220100022101221} is an apocalyptic number.

It is an amenable number.

220100022101221 is a deficient number, since it is larger than the sum of its proper divisors (11019585297179).

220100022101221 is a wasteful number, since it uses less digits than its factorization.

220100022101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386409.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220100022101221 its reverse (122101220001022), we get a palindrome (342201242102243).

The spelling of 220100022101221 in words is "two hundred twenty trillion, one hundred billion, twenty-two million, one hundred one thousand, two hundred twenty-one".