210221100002201 has 4 divisors (see below), whose sum is σ = 222587047061172. Its totient is φ = 197855152943232.

The previous prime is 210221100002197. The next prime is 210221100002219. The reversal of 210221100002201 is 102200001122012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62008128226576 + 148212971775625 = 7874524^2 + 12174275^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221100002201 - 2² = 210221100002197 is a prime.

It is a super-2 number, since 2×210221100002201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210221100002231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6182973529460 + ... + 6182973529493.

It is an arithmetic number, because the mean of its divisors is an integer number (55646761765293).

Almost surely, 2^{210221100002201} is an apocalyptic number.

It is an amenable number.

210221100002201 is a deficient number, since it is larger than the sum of its proper divisors (12365947058971).

210221100002201 is a wasteful number, since it uses less digits than its factorization.

210221100002201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12365947058970.

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

Adding to 210221100002201 its reverse (102200001122012), we get a palindrome (312421101124213).

The spelling of 210221100002201 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred million, two thousand, two hundred one".