210221110000221 has 16 divisors (see below), whose sum is σ = 281530727806464. Its totient is φ = 139529454411824.

The previous prime is 210221110000193. The next prime is 210221110000243. The reversal of 210221110000221 is 122000011122012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210221110000221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210221110000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221110070221) 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, 232237126 + ... + 233140568.

It is an arithmetic number, because the mean of its divisors is an integer number (17595670487904).

Almost surely, 2^{210221110000221} is an apocalyptic number.

It is an amenable number.

210221110000221 is a deficient number, since it is larger than the sum of its proper divisors (71309617806243).

210221110000221 is a wasteful number, since it uses less digits than its factorization.

210221110000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245360.

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

Adding to 210221110000221 its reverse (122000011122012), we get a palindrome (332221121122233).

The spelling of 210221110000221 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred ten million, two hundred twenty-one", and thus it is an aban number.