212021210122112 has 128 divisors (see below), whose sum is σ = 454662419302080. Its totient is φ = 98124070912000.

The previous prime is 212021210122097. The next prime is 212021210122123. The reversal of 212021210122112 is 211221012120212.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60241748 + ... + 63664044.

Almost surely, 2^{212021210122112} 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 212021210122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227331209651040).

212021210122112 is an abundant number, since it is smaller than the sum of its proper divisors (242641209179968).

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

212021210122112 is a wasteful number, since it uses less digits than its factorization.

212021210122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422800 (or 3422788 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212021210122112 its reverse (211221012120212), we get a palindrome (423242222242324).

The spelling of 212021210122112 in words is "two hundred twelve trillion, twenty-one billion, two hundred ten million, one hundred twenty-two thousand, one hundred twelve".