210200111220221 has 16 divisors (see below), whose sum is σ = 228772334856240. Its totient is φ = 192650387166720.

The previous prime is 210200111220167. The next prime is 210200111220241. The reversal of 210200111220221 is 122022111002012.

It can be written as a sum of positive squares in 8 ways, for example, as 397922517721 + 209802188702500 = 630811^2 + 14484550^2 .

It is a cyclic number.

It is not a de Polignac number, because 210200111220221 - 2⁴⁶ = 139831367042557 is a prime.

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 210200111220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210200111220241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2388973706 + ... + 2389061691.

It is an arithmetic number, because the mean of its divisors is an integer number (14298270928515).

Almost surely, 2^{210200111220221} is an apocalyptic number.

It is an amenable number.

210200111220221 is a deficient number, since it is larger than the sum of its proper divisors (18572223636019).

210200111220221 is a wasteful number, since it uses less digits than its factorization.

210200111220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778035504.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210200111220221 its reverse (122022111002012), we get a palindrome (332222222222233).

The spelling of 210200111220221 in words is "two hundred ten trillion, two hundred billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-one".