220111121221 has 8 divisors (see below), whose sum is σ = 233330163840. Its totient is φ = 206922226368.

The previous prime is 220111121213. The next prime is 220111121233. The reversal of 220111121221 is 122121111022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220111121221 - 2³ = 220111121213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220111121195 and 220111121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111121201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7521901 + ... + 7551106.

It is an arithmetic number, because the mean of its divisors is an integer number (29166270480).

Almost surely, 2^220111121221 is an apocalyptic number.

It is an amenable number.

220111121221 is a deficient number, since it is larger than the sum of its proper divisors (13219042619).

220111121221 is a wasteful number, since it uses less digits than its factorization.

220111121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15073883.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 220111121221 its reverse (122121111022), we get a palindrome (342232232243).

The spelling of 220111121221 in words is "two hundred twenty billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".