212412335340 has 96 divisors (see below), whose sum is σ = 600339128256. Its totient is φ = 56111964160.

The previous prime is 212412335297. The next prime is 212412335341. The reversal of 212412335340 is 43533214212.

It is a super-2 number, since 2×212412335340² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 212412335298 and 212412335307.

It is not an unprimeable number, because it can be changed into a prime (212412335341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14508664 + ... + 14523296.

It is an arithmetic number, because the mean of its divisors is an integer number (6253532586).

Almost surely, 2^212412335340 is an apocalyptic number.

212412335340 is a gapful number since it is divisible by the number (20) 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 212412335340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300169564128).

212412335340 is an abundant number, since it is smaller than the sum of its proper divisors (387926792916).

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

212412335340 is a wasteful number, since it uses less digits than its factorization.

212412335340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16899 (or 16897 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 212412335340 its reverse (43533214212), we get a palindrome (255945549552).

The spelling of 212412335340 in words is "two hundred twelve billion, four hundred twelve million, three hundred thirty-five thousand, three hundred forty".