201021100002221 has 8 divisors (see below), whose sum is σ = 201119913023040. Its totient is φ = 200922289458912.

The previous prime is 201021100002133. The next prime is 201021100002293. The reversal of 201021100002221 is 122200001120102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201021100002221 - 2²⁶ = 201021032893357 is a prime.

It is a super-2 number, since 2×201021100002221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201021100002196 and 201021100002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021100082221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173735816 + ... + 174889038.

It is an arithmetic number, because the mean of its divisors is an integer number (25139989127880).

Almost surely, 2^{201021100002221} is an apocalyptic number.

It is an amenable number.

201021100002221 is a deficient number, since it is larger than the sum of its proper divisors (98813020819).

201021100002221 is a wasteful number, since it uses less digits than its factorization.

201021100002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238755.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201021100002221 its reverse (122200001120102), we get a palindrome (323221101122323).

The spelling of 201021100002221 in words is "two hundred one trillion, twenty-one billion, one hundred million, two thousand, two hundred twenty-one".