220121220111111 has 64 divisors (see below), whose sum is σ = 376772623872000. Its totient is φ = 125610018524640.

The previous prime is 220121220111109. The next prime is 220121220111269. The reversal of 220121220111111 is 111111022121022.

It is a happy number.

220121220111111 is a `hidden beast` number, since 2 + 201 + 21 + 220 + 111 + 111 = 666.

220121220111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220121220111111 - 2¹ = 220121220111109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121220511111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118736131 + ... + 120575748.

It is an arithmetic number, because the mean of its divisors is an integer number (5887072248000).

Almost surely, 2^{220121220111111} is an apocalyptic number.

220121220111111 is a deficient number, since it is larger than the sum of its proper divisors (156651403760889).

220121220111111 is a wasteful number, since it uses less digits than its factorization.

220121220111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239312081 (or 239312075 counting only the distinct ones).

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

Adding to 220121220111111 its reverse (111111022121022), we get a palindrome (331232242232133).

The spelling of 220121220111111 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".