211121021112212 has 24 divisors (see below), whose sum is σ = 391217096581416. Its totient is φ = 99345414576128.

The previous prime is 211121021112203. The next prime is 211121021112217. The reversal of 211121021112212 is 212211120121112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 136310388441616 + 74810632670596 = 11675204^2 + 8649314^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121021112217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 87142853 + ... + 89532780.

It is an arithmetic number, because the mean of its divisors is an integer number (16300712357559).

Almost surely, 2^{211121021112212} is an apocalyptic number.

It is an amenable number.

211121021112212 is a deficient number, since it is larger than the sum of its proper divisors (180096075469204).

211121021112212 is a wasteful number, since it uses less digits than its factorization.

211121021112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176693227 (or 176693225 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211121021112212 its reverse (212211120121112), we get a palindrome (423332141233324).

The spelling of 211121021112212 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, two hundred twelve".