220122101221 has 16 divisors (see below), whose sum is σ = 241966771200. Its totient is φ = 198584290800.

The previous prime is 220122101183. The next prime is 220122101239. The reversal of 220122101221 is 122101221022.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220122101221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220122101195 and 220122101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220122101281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3594900 + ... + 3655618.

It is an arithmetic number, because the mean of its divisors is an integer number (15122923200).

Almost surely, 2^220122101221 is an apocalyptic number.

It is an amenable number.

220122101221 is a deficient number, since it is larger than the sum of its proper divisors (21844669979).

220122101221 is a wasteful number, since it uses less digits than its factorization.

220122101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63240.

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

Adding to 220122101221 its reverse (122101221022), we get a palindrome (342223322243).

The spelling of 220122101221 in words is "two hundred twenty billion, one hundred twenty-two million, one hundred one thousand, two hundred twenty-one".