220112111221 has 16 divisors (see below), whose sum is σ = 235609560000. Its totient is φ = 205032110976.

The previous prime is 220112111213. The next prime is 220112111243. The reversal of 220112111221 is 122111211022.

It is not a de Polignac number, because 220112111221 - 2³ = 220112111213 is a prime.

It is a super-2 number, since 2×220112111221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220112111195 and 220112111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220112114221) 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, 60906 + ... + 666283.

It is an arithmetic number, because the mean of its divisors is an integer number (14725597500).

Almost surely, 2^220112111221 is an apocalyptic number.

It is an amenable number.

220112111221 is a deficient number, since it is larger than the sum of its proper divisors (15497448779).

220112111221 is a wasteful number, since it uses less digits than its factorization.

220112111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727476.

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

Adding to 220112111221 its reverse (122111211022), we get a palindrome (342223322243).

The spelling of 220112111221 in words is "two hundred twenty billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty-one".