210201121102221 has 12 divisors (see below), whose sum is σ = 303624240868572. Its totient is φ = 140133896453376.

The previous prime is 210201121102151. The next prime is 210201121102253. The reversal of 210201121102221 is 122201121102012.

210201121102221 is a `hidden beast` number, since 21 + 0 + 201 + 121 + 102 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 190017540549225 + 20183580552996 = 13784685^2 + 4492614^2 .

It is not a de Polignac number, because 210201121102221 - 2²¹ = 210201119005069 is a prime.

It is a super-2 number, since 2×210201121102221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210201121102194 and 210201121102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201121102421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7944346 + ... + 21988971.

It is an arithmetic number, because the mean of its divisors is an integer number (25302020072381).

Almost surely, 2^{210201121102221} is an apocalyptic number.

It is an amenable number.

210201121102221 is a deficient number, since it is larger than the sum of its proper divisors (93423119766351).

210201121102221 is a wasteful number, since it uses less digits than its factorization.

210201121102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30713580 (or 30713577 counting only the distinct ones).

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

Adding to 210201121102221 its reverse (122201121102012), we get a palindrome (332402242204233).

The spelling of 210201121102221 in words is "two hundred ten trillion, two hundred one billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty-one".