211221000122212 has 12 divisors (see below), whose sum is σ = 385707913266816. Its totient is φ = 101018739188840.

The previous prime is 211221000122137. The next prime is 211221000122257. The reversal of 211221000122212 is 212221000122112.

It is a super-2 number, since 2×211221000122212² (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 211221000122212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1147940217964 + ... + 1147940218147.

It is an arithmetic number, because the mean of its divisors is an integer number (32142326105568).

Almost surely, 2^{211221000122212} is an apocalyptic number.

It is an amenable number.

211221000122212 is a deficient number, since it is larger than the sum of its proper divisors (174486913144604).

211221000122212 is a wasteful number, since it uses less digits than its factorization.

211221000122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295880436138 (or 2295880436136 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211221000122212 its reverse (212221000122112), we get a palindrome (423442000244324).

The spelling of 211221000122212 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two thousand, two hundred twelve".