212002312 has 8 divisors (see below), whose sum is σ = 397504350. Its totient is φ = 106001152.

The previous prime is 212002303. The next prime is 212002313. The reversal of 212002312 is 213200212.

It can be written as a sum of positive squares in only one way, i.e., 139854276 + 72148036 = 11826^2 + 8494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 212002292 and 212002301.

It is not an unprimeable number, because it can be changed into a prime (212002313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13250137 + ... + 13250152.

Almost surely, 2^212002312 is an apocalyptic number.

It is an amenable number.

212002312 is a deficient number, since it is larger than the sum of its proper divisors (185502038).

212002312 is a wasteful number, since it uses less digits than its factorization.

212002312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26500295 (or 26500291 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212002312 is about 14560.2991727505. The cubic root of 212002312 is about 596.2753633508.

Adding to 212002312 its reverse (213200212), we get a palindrome (425202524).

The spelling of 212002312 in words is "two hundred twelve million, two thousand, three hundred twelve".