210211210222221 has 16 divisors (see below), whose sum is σ = 302383643958144. Its totient is φ = 129128499236544.

The previous prime is 210211210222177. The next prime is 210211210222229. The reversal of 210211210222221 is 122222012112012.

It is not a de Polignac number, because 210211210222221 - 2⁹ = 210211210221709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210211210222229) 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, 4838426241 + ... + 4838469686.

It is an arithmetic number, because the mean of its divisors is an integer number (18898977747384).

Almost surely, 2^{210211210222221} is an apocalyptic number.

It is an amenable number.

210211210222221 is a deficient number, since it is larger than the sum of its proper divisors (92172433735923).

210211210222221 is a wasteful number, since it uses less digits than its factorization.

210211210222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9676896500.

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

Adding to 210211210222221 its reverse (122222012112012), we get a palindrome (332433222334233).

The spelling of 210211210222221 in words is "two hundred ten trillion, two hundred eleven billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".