210221211010211 has 4 divisors (see below), whose sum is σ = 210367911089112. Its totient is φ = 210074510931312.

The previous prime is 210221211010163. The next prime is 210221211010247. The reversal of 210221211010211 is 112010112122012.

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

It is a cyclic number.

It is not a de Polignac number, because 210221211010211 - 2¹⁸ = 210221210748067 is a prime.

It is a super-2 number, since 2×210221211010211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210221211010211.

It is not an unprimeable number, because it can be changed into a prime (210221211010711) 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, 73350037301 + ... + 73350040166.

It is an arithmetic number, because the mean of its divisors is an integer number (52591977772278).

Almost surely, 2^{210221211010211} is an apocalyptic number.

210221211010211 is a deficient number, since it is larger than the sum of its proper divisors (146700078901).

210221211010211 is a wasteful number, since it uses less digits than its factorization.

210221211010211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146700078900.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210221211010211 its reverse (112010112122012), we get a palindrome (322231323132223).

The spelling of 210221211010211 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred eleven million, ten thousand, two hundred eleven".