210120222221 has 16 divisors (see below), whose sum is σ = 258639206784. Its totient is φ = 166229872704.

The previous prime is 210120222217. The next prime is 210120222233. The reversal of 210120222221 is 122222021012.

It is a happy number.

It is not a de Polignac number, because 210120222221 - 2² = 210120222217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210120222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120225221) 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, 692090 + ... + 948276.

It is an arithmetic number, because the mean of its divisors is an integer number (16164950424).

Almost surely, 2^210120222221 is an apocalyptic number.

It is an amenable number.

210120222221 is a deficient number, since it is larger than the sum of its proper divisors (48518984563).

210120222221 is a wasteful number, since it uses less digits than its factorization.

210120222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265220.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210120222221 its reverse (122222021012), we get a palindrome (332342243233).

The spelling of 210120222221 in words is "two hundred ten billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".