212101210112212 has 6 divisors (see below), whose sum is σ = 371177117696378. Its totient is φ = 106050605056104.

The previous prime is 212101210112177. The next prime is 212101210112237. The reversal of 212101210112212 is 212211012101212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 198182087776656 + 13919122335556 = 14077716^2 + 3730834^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212101210112212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26512651264023 + ... + 26512651264030.

Almost surely, 2^{212101210112212} is an apocalyptic number.

It is an amenable number.

212101210112212 is a deficient number, since it is larger than the sum of its proper divisors (159075907584166).

212101210112212 is a wasteful number, since it uses less digits than its factorization.

212101210112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53025302528057 (or 53025302528055 counting only the distinct ones).

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

Adding to 212101210112212 its reverse (212211012101212), we get a palindrome (424312222213424).

The spelling of 212101210112212 in words is "two hundred twelve trillion, one hundred one billion, two hundred ten million, one hundred twelve thousand, two hundred twelve".