212001112121212 has 24 divisors (see below), whose sum is σ = 387144369301536. Its totient is φ = 101388718599168.

The previous prime is 212001112121177. The next prime is 212001112121233. The reversal of 212001112121212 is 212121211100212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212001112121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32417973 + ... + 38404780.

It is an arithmetic number, because the mean of its divisors is an integer number (16131015387564).

Almost surely, 2^{212001112121212} is an apocalyptic number.

It is an amenable number.

212001112121212 is a deficient number, since it is larger than the sum of its proper divisors (175143257180324).

212001112121212 is a wasteful number, since it uses less digits than its factorization.

212001112121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70855317 (or 70855315 counting only the distinct ones).

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

Adding to 212001112121212 its reverse (212121211100212), we get a palindrome (424122323221424).

The spelling of 212001112121212 in words is "two hundred twelve trillion, one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twelve".