220111122110121 has 24 divisors (see below), whose sum is σ = 346869658010304. Its totient is φ = 133389953206560.

The previous prime is 220111122110119. The next prime is 220111122110129. The reversal of 220111122110121 is 121011221111022.

It is a happy number.

220111122110121 is a `hidden beast` number, since 2 + 201 + 111 + 221 + 10 + 121 = 666.

It is not a de Polignac number, because 220111122110121 - 2¹ = 220111122110119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220111122110094 and 220111122110103.

It is not an unprimeable number, because it can be changed into a prime (220111122110129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88153021 + ... + 90615546.

It is an arithmetic number, because the mean of its divisors is an integer number (14452902417096).

Almost surely, 2^{220111122110121} is an apocalyptic number.

It is an amenable number.

220111122110121 is a deficient number, since it is larger than the sum of its proper divisors (126758535900183).

220111122110121 is a wasteful number, since it uses less digits than its factorization.

220111122110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178781021 (or 178781018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 220111122110121 its reverse (121011221111022), we get a palindrome (341122343221143).

Subtracting from 220111122110121 its reverse (121011221111022), we obtain a palindrome (99099900999099).

The spelling of 220111122110121 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, one hundred twenty-one".