210221210200101 has 4 divisors (see below), whose sum is σ = 280294946933472. Its totient is φ = 140147473466732.

The previous prime is 210221210200061. The next prime is 210221210200151. The reversal of 210221210200101 is 101002012122012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210221210200101 - 2¹⁷ = 210221210069029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221210200151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35036868366681 + ... + 35036868366686.

It is an arithmetic number, because the mean of its divisors is an integer number (70073736733368).

Almost surely, 2^{210221210200101} is an apocalyptic number.

It is an amenable number.

210221210200101 is a deficient number, since it is larger than the sum of its proper divisors (70073736733371).

210221210200101 is an equidigital number, since it uses as much as digits as its factorization.

210221210200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70073736733370.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210221210200101 its reverse (101002012122012), we get a palindrome (311223222322113).

The spelling of 210221210200101 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred ten million, two hundred thousand, one hundred one".