212424333442 has 64 divisors (see below), whose sum is σ = 345383831520. Its totient is φ = 97619558400.

The previous prime is 212424333439. The next prime is 212424333449. The reversal of 212424333442 is 244333424212.

It can be written as a sum of positive squares in 16 ways, for example, as 1632240801 + 210792092641 = 40401^2 + 459121^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 212424333398 and 212424333407.

It is not an unprimeable number, because it can be changed into a prime (212424333449) 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, 226706398 + ... + 226707334.

Almost surely, 2^212424333442 is an apocalyptic number.

212424333442 is a deficient number, since it is larger than the sum of its proper divisors (132959498078).

212424333442 is a wasteful number, since it uses less digits than its factorization.

212424333442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its digits is 110592, while the sum is 34.

Adding to 212424333442 its reverse (244333424212), we get a palindrome (456757757654).

The spelling of 212424333442 in words is "two hundred twelve billion, four hundred twenty-four million, three hundred thirty-three thousand, four hundred forty-two".