212431021424 has 10 divisors (see below), whose sum is σ = 411585104040. Its totient is φ = 106215510704.

The previous prime is 212431021423. The next prime is 212431021427. The reversal of 212431021424 is 424120134212.

It is a junction number, because it is equal to n+sod(n) for n = 212431021393 and 212431021402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212431021423) 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 as a sum of consecutive naturals, namely, 6638469404 + ... + 6638469435.

It is an arithmetic number, because the mean of its divisors is an integer number (41158510404).

Almost surely, 2^212431021424 is an apocalyptic number.

It is an amenable number.

212431021424 is a deficient number, since it is larger than the sum of its proper divisors (199154082616).

212431021424 is a wasteful number, since it uses less digits than its factorization.

212431021424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13276938847 (or 13276938841 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 212431021424 its reverse (424120134212), we get a palindrome (636551155636).

The spelling of 212431021424 in words is "two hundred twelve billion, four hundred thirty-one million, twenty-one thousand, four hundred twenty-four".