212102111312 has 160 divisors (see below), whose sum is σ = 516426946560. Its totient is φ = 82155202560.

The previous prime is 212102111269. The next prime is 212102111317. The reversal of 212102111312 is 213111201212.

It is a happy number.

It is a super-2 number, since 2×212102111312² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102111317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19800614 + ... + 19811322.

It is an arithmetic number, because the mean of its divisors is an integer number (3227668416).

Almost surely, 2^212102111312 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 212102111312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258213473280).

212102111312 is an abundant number, since it is smaller than the sum of its proper divisors (304324835248).

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

212102111312 is a wasteful number, since it uses less digits than its factorization.

212102111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11021 (or 11015 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212102111312 its reverse (213111201212), we get a palindrome (425213312524).

The spelling of 212102111312 in words is "two hundred twelve billion, one hundred two million, one hundred eleven thousand, three hundred twelve".