211121221220212 has 24 divisors (see below), whose sum is σ = 371566306605312. Its totient is φ = 104959616954400.

The previous prime is 211121221220201. The next prime is 211121221220219. The reversal of 211121221220212 is 212022122121112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121221220219) 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, 20425864 + ... + 28973407.

It is an arithmetic number, because the mean of its divisors is an integer number (15481929441888).

Almost surely, 2^{211121221220212} is an apocalyptic number.

It is an amenable number.

211121221220212 is a deficient number, since it is larger than the sum of its proper divisors (160445085385100).

211121221220212 is a wasteful number, since it uses less digits than its factorization.

211121221220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49405359 (or 49405357 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211121221220212 its reverse (212022122121112), we get a palindrome (423143343341324).

The spelling of 211121221220212 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twelve".