212121310112112 has 20 divisors (see below), whose sum is σ = 547980051123080. Its totient is φ = 70707103370688.

The previous prime is 212121310112111. The next prime is 212121310112119. The reversal of 212121310112112 is 211211013121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121310112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2209596980287 + ... + 2209596980382.

It is an arithmetic number, because the mean of its divisors is an integer number (27399002556154).

Almost surely, 2^{212121310112112} is an apocalyptic number.

It is an amenable number.

212121310112112 is an abundant number, since it is smaller than the sum of its proper divisors (335858741010968).

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

212121310112112 is a wasteful number, since it uses less digits than its factorization.

212121310112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419193960680 (or 4419193960674 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 212121310112112 its reverse (211211013121212), we get a palindrome (423332323233324).

The spelling of 212121310112112 in words is "two hundred twelve trillion, one hundred twenty-one billion, three hundred ten million, one hundred twelve thousand, one hundred twelve".