212451234343012 has 72 divisors (see below), whose sum is σ = 439765752961080. Its totient is φ = 89530098577920.

The previous prime is 212451234342983. The next prime is 212451234343013. The reversal of 212451234343012 is 210343432154212.

It can be written as a sum of positive squares in 4 ways, for example, as 38462893807716 + 173988340535296 = 6201846^2 + 13190464^2 .

It is not an unprimeable number, because it can be changed into a prime (212451234343013) 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, 30486403 + ... + 36801130.

It is an arithmetic number, because the mean of its divisors is an integer number (6107857680015).

Almost surely, 2^{212451234343012} is an apocalyptic number.

It is an amenable number.

212451234343012 is an abundant number, since it is smaller than the sum of its proper divisors (227314518618068).

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

212451234343012 is a wasteful number, since it uses less digits than its factorization.

212451234343012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67287821 (or 67287812 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 212451234343012 its reverse (210343432154212), we get a palindrome (422794666497224).

The spelling of 212451234343012 in words is "two hundred twelve trillion, four hundred fifty-one billion, two hundred thirty-four million, three hundred forty-three thousand, twelve".