212122608312 has 128 divisors (see below), whose sum is σ = 542659772160. Its totient is φ = 69085685760.

The previous prime is 212122608311. The next prime is 212122608317. The reversal of 212122608312 is 213806221212.

212122608312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 212122608312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122608311) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 55775803 + ... + 55779605.

It is an arithmetic number, because the mean of its divisors is an integer number (4239529470).

Almost surely, 2^212122608312 is an apocalyptic number.

It is an amenable number.

212122608312 is an abundant number, since it is smaller than the sum of its proper divisors (330537163848).

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

212122608312 is a wasteful number, since it uses less digits than its factorization.

212122608312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213 (or 4209 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 212122608312 its reverse (213806221212), we get a palindrome (425928829524).

The spelling of 212122608312 in words is "two hundred twelve billion, one hundred twenty-two million, six hundred eight thousand, three hundred twelve".