210221220120211 has 4 divisors (see below), whose sum is σ = 221285494863400. Its totient is φ = 199156945377024.

The previous prime is 210221220120209. The next prime is 210221220120221. The reversal of 210221220120211 is 112021022122012.

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 210221220120211 - 2¹ = 210221220120209 is a prime.

It is a super-2 number, since 2×210221220120211² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11064274743169 = 210221220120211 / (2 + 1 + 0 + 2 + 2 + 1 + 2 + 2 + 0 + 1 + 2 + 0 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210221220120221) 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, 5532137371566 + ... + 5532137371603.

It is an arithmetic number, because the mean of its divisors is an integer number (55321373715850).

Almost surely, 2^{210221220120211} is an apocalyptic number.

210221220120211 is a deficient number, since it is larger than the sum of its proper divisors (11064274743189).

210221220120211 is a wasteful number, since it uses less digits than its factorization.

210221220120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064274743188.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210221220120211 its reverse (112021022122012), we get a palindrome (322242242242223).

The spelling of 210221220120211 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, two hundred eleven".