212112013212 has 144 divisors (see below), whose sum is σ = 620692450560. Its totient is φ = 60439526400.

The previous prime is 212112013147. The next prime is 212112013213. The reversal of 212112013212 is 212310211212.

It is a super-2 number, since 2×212112013212² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112013213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 340012 + ... + 734732.

It is an arithmetic number, because the mean of its divisors is an integer number (4310364240).

Almost surely, 2^212112013212 is an apocalyptic number.

212112013212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212112013212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310346225280).

212112013212 is an abundant number, since it is smaller than the sum of its proper divisors (408580437348).

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

212112013212 is a wasteful number, since it uses less digits than its factorization.

212112013212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394824 (or 394819 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212112013212 its reverse (212310211212), we get a palindrome (424422224424).

The spelling of 212112013212 in words is "two hundred twelve billion, one hundred twelve million, thirteen thousand, two hundred twelve".