220212211121 has 16 divisors (see below), whose sum is σ = 252029825280. Its totient is φ = 188484468480.

The previous prime is 220212211117. The next prime is 220212211129. The reversal of 220212211121 is 121112212022.

It is not a de Polignac number, because 220212211121 - 2² = 220212211117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220212211121.

It is not an unprimeable number, because it can be changed into a prime (220212211129) 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, 17739965 + ... + 17752373.

It is an arithmetic number, because the mean of its divisors is an integer number (15751864080).

Almost surely, 2^220212211121 is an apocalyptic number.

It is an amenable number.

220212211121 is a deficient number, since it is larger than the sum of its proper divisors (31817614159).

220212211121 is a wasteful number, since it uses less digits than its factorization.

220212211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15824.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220212211121 its reverse (121112212022), we get a palindrome (341324423143).

Subtracting from 220212211121 its reverse (121112212022), we obtain a palindrome (99099999099).

The spelling of 220212211121 in words is "two hundred twenty billion, two hundred twelve million, two hundred eleven thousand, one hundred twenty-one".