221021220110121 has 48 divisors (see below), whose sum is σ = 325397020096512. Its totient is φ = 144537906636000.

The previous prime is 221021220110027. The next prime is 221021220110137. The reversal of 221021220110121 is 121011022120122.

221021220110121 is a `hidden beast` number, since 2 + 210 + 2 + 1 + 220 + 110 + 121 = 666.

221021220110121 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 221021220110121 - 2⁹ = 221021220109609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221021220110094 and 221021220110103.

It is not an unprimeable number, because it can be changed into a prime (221021220110521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232225306 + ... + 233175116.

It is an arithmetic number, because the mean of its divisors is an integer number (6779104585344).

Almost surely, 2^{221021220110121} is an apocalyptic number.

It is an amenable number.

221021220110121 is a deficient number, since it is larger than the sum of its proper divisors (104375799986391).

221021220110121 is a wasteful number, since it uses less digits than its factorization.

221021220110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952114 (or 952111 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221021220110121 its reverse (121011022120122), we get a palindrome (342032242230243).

The spelling of 221021220110121 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-one".