211100112221212 has 24 divisors (see below), whose sum is σ = 369688684684032. Its totient is φ = 105474775302000.

The previous prime is 211100112221203. The next prime is 211100112221221. The reversal of 211100112221212 is 212122211001112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211100112221203) and next prime (211100112221221).

It is a self number, because there is not a number n which added to its sum of digits gives 211100112221212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950743287 + ... + 950965297.

It is an arithmetic number, because the mean of its divisors is an integer number (15403695195168).

Almost surely, 2^{211100112221212} is an apocalyptic number.

It is an amenable number.

211100112221212 is a deficient number, since it is larger than the sum of its proper divisors (158588572462820).

211100112221212 is a wasteful number, since it uses less digits than its factorization.

211100112221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390489 (or 390487 counting only the distinct ones).

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

Adding to 211100112221212 its reverse (212122211001112), we get a palindrome (423222323222324).

The spelling of 211100112221212 in words is "two hundred eleven trillion, one hundred billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twelve".