212102110221 has 16 divisors (see below), whose sum is σ = 300756120000. Its totient is φ = 132578201088.

The previous prime is 212102110163. The next prime is 212102110229. The reversal of 212102110221 is 122011201212.

It is not a de Polignac number, because 212102110221 - 2²² = 212097915917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212102110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102110229) 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, 19175346 + ... + 19186403.

It is an arithmetic number, because the mean of its divisors is an integer number (18797257500).

Almost surely, 2^212102110221 is an apocalyptic number.

It is an amenable number.

212102110221 is a deficient number, since it is larger than the sum of its proper divisors (88654009779).

212102110221 is a wasteful number, since it uses less digits than its factorization.

212102110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38361868.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212102110221 its reverse (122011201212), we get a palindrome (334113311433).

Subtracting from 212102110221 its reverse (122011201212), we obtain a palindrome (90090909009).

The spelling of 212102110221 in words is "two hundred twelve billion, one hundred two million, one hundred ten thousand, two hundred twenty-one".