212001313212 has 72 divisors (see below), whose sum is σ = 577674681584. Its totient is φ = 65167877376.

The previous prime is 212001313201. The next prime is 212001313213. The reversal of 212001313212 is 212313100212.

212001313212 is a `hidden beast` number, since 212 + 0 + 0 + 131 + 321 + 2 = 666.

It is a super-2 number, since 2×212001313212² (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 (212001313213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264183 + ... + 702705.

Almost surely, 2^212001313212 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 212001313212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288837340792).

212001313212 is an abundant number, since it is smaller than the sum of its proper divisors (365673368372).

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

212001313212 is a wasteful number, since it uses less digits than its factorization.

212001313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439579 (or 439574 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212001313212 its reverse (212313100212), we get a palindrome (424314413424).

The spelling of 212001313212 in words is "two hundred twelve billion, one million, three hundred thirteen thousand, two hundred twelve".