210221102111212 has 12 divisors (see below), whose sum is σ = 376859780614296. Its totient is φ = 102546879078560.

The previous prime is 210221102111201. The next prime is 210221102111257. The reversal of 210221102111212 is 212111201122012.

It is a happy number.

It is a super-2 number, since 2×210221102111212² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210221102111212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640917994078 + ... + 640917994405.

It is an arithmetic number, because the mean of its divisors is an integer number (31404981717858).

Almost surely, 2^{210221102111212} is an apocalyptic number.

It is an amenable number.

210221102111212 is a deficient number, since it is larger than the sum of its proper divisors (166638678503084).

210221102111212 is a wasteful number, since it uses less digits than its factorization.

210221102111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281835988528 (or 1281835988526 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210221102111212 its reverse (212111201122012), we get a palindrome (422332303233224).

The spelling of 210221102111212 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred two million, one hundred eleven thousand, two hundred twelve".