210212211202221 has 16 divisors (see below), whose sum is σ = 281433472842240. Its totient is φ = 139566613999680.

The previous prime is 210212211202181. The next prime is 210212211202249. The reversal of 210212211202221 is 122202112212012.

It is not a de Polignac number, because 210212211202221 - 2⁶ = 210212211202157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212211202921) 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, 48176530 + ... + 52358403.

It is an arithmetic number, because the mean of its divisors is an integer number (17589592052640).

Almost surely, 2^{210212211202221} is an apocalyptic number.

It is an amenable number.

210212211202221 is a deficient number, since it is larger than the sum of its proper divisors (71221261640019).

210212211202221 is a wasteful number, since it uses less digits than its factorization.

210212211202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100537796.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 210212211202221 its reverse (122202112212012), we get a palindrome (332414323414233).

The spelling of 210212211202221 in words is "two hundred ten trillion, two hundred twelve billion, two hundred eleven million, two hundred two thousand, two hundred twenty-one".