210211200020221 has 4 divisors (see below), whose sum is σ = 210783982581952. Its totient is φ = 209638417458492.

The previous prime is 210211200020203. The next prime is 210211200020299. The reversal of 210211200020221 is 122020002112012.

It is a happy number.

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 210211200020221 - 2⁵ = 210211200020189 is a prime.

It is a super-2 number, since 2×210211200020221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210211200020195 and 210211200020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210211200020821) 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, 286391280315 + ... + 286391281048.

It is an arithmetic number, because the mean of its divisors is an integer number (52695995645488).

Almost surely, 2^{210211200020221} is an apocalyptic number.

It is an amenable number.

210211200020221 is a deficient number, since it is larger than the sum of its proper divisors (572782561731).

210211200020221 is an equidigital number, since it uses as much as digits as its factorization.

210211200020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572782561730.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210211200020221 its reverse (122020002112012), we get a palindrome (332231202132233).

The spelling of 210211200020221 in words is "two hundred ten trillion, two hundred eleven billion, two hundred million, twenty thousand, two hundred twenty-one".