212111210122112 has 128 divisors (see below), whose sum is σ = 483538928125440. Its totient is φ = 90790558967808.

The previous prime is 212111210122109. The next prime is 212111210122129. The reversal of 212111210122112 is 211221012111212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4274084243 + ... + 4274133869.

It is an arithmetic number, because the mean of its divisors is an integer number (3777647875980).

Almost surely, 2^{212111210122112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212111210122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241769464062720).

212111210122112 is an abundant number, since it is smaller than the sum of its proper divisors (271427718003328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212111210122112 is an equidigital number, since it uses as much as digits as its factorization.

212111210122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55548 (or 55536 counting only the distinct ones).

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

Adding to 212111210122112 its reverse (211221012111212), we get a palindrome (423332222233324).

The spelling of 212111210122112 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-two thousand, one hundred twelve".