210002221022121 has 24 divisors (see below), whose sum is σ = 330932584378656. Its totient is φ = 127266383471040.

The previous prime is 210002221022053. The next prime is 210002221022141. The reversal of 210002221022121 is 121220122200012.

It is a happy number.

210002221022121 is a `hidden beast` number, since 210 + 0 + 0 + 2 + 2 + 210 + 221 + 21 = 666.

It is not a de Polignac number, because 210002221022121 - 2⁷ = 210002221021993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210002221022094 and 210002221022103.

It is not an unprimeable number, because it can be changed into a prime (210002221022141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62435275 + ... + 65712768.

It is an arithmetic number, because the mean of its divisors is an integer number (13788857682444).

Almost surely, 2^{210002221022121} is an apocalyptic number.

It is an amenable number.

210002221022121 is a deficient number, since it is larger than the sum of its proper divisors (120930363356535).

210002221022121 is a wasteful number, since it uses less digits than its factorization.

210002221022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128164613 (or 128164610 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210002221022121 its reverse (121220122200012), we get a palindrome (331222343222133).

The spelling of 210002221022121 in words is "two hundred ten trillion, two billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-one".