212431121320240 has 40 divisors (see below), whose sum is σ = 504410917867200. Its totient is φ = 83164524089856.

The previous prime is 212431121320237. The next prime is 212431121320241. The reversal of 212431121320240 is 42023121134212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 212431121320199 and 212431121320208.

It is not an unprimeable number, because it can be changed into a prime (212431121320241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28248815565 + ... + 28248823084.

It is an arithmetic number, because the mean of its divisors is an integer number (12610272946680).

Almost surely, 2^{212431121320240} is an apocalyptic number.

212431121320240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212431121320240 is an abundant number, since it is smaller than the sum of its proper divisors (291979796546960).

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

212431121320240 is a wasteful number, since it uses less digits than its factorization.

212431121320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56497638709 (or 56497638703 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 212431121320240 its reverse (42023121134212), we get a palindrome (254454242454452).

The spelling of 212431121320240 in words is "two hundred twelve trillion, four hundred thirty-one billion, one hundred twenty-one million, three hundred twenty thousand, two hundred forty".