212224043236 has 12 divisors (see below), whose sum is σ = 377480470780. Its totient is φ = 104372480160.

The previous prime is 212224043191. The next prime is 212224043237. The reversal of 212224043236 is 632340422212.

It can be written as a sum of positive squares in 2 ways, for example, as 109058457600 + 103165585636 = 330240^2 + 321194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212224043198 and 212224043207.

It is not an unprimeable number, because it can be changed into a prime (212224043237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434885091 + ... + 434885578.

Almost surely, 2^212224043236 is an apocalyptic number.

It is an amenable number.

212224043236 is a deficient number, since it is larger than the sum of its proper divisors (165256427544).

212224043236 is a wasteful number, since it uses less digits than its factorization.

212224043236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869770734 (or 869770732 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 212224043236 its reverse (632340422212), we get a palindrome (844564465448).

The spelling of 212224043236 in words is "two hundred twelve billion, two hundred twenty-four million, forty-three thousand, two hundred thirty-six".