212021230312 has 8 divisors (see below), whose sum is σ = 397539806850. Its totient is φ = 106010615152.

The previous prime is 212021230307. The next prime is 212021230319. The reversal of 212021230312 is 213032120212.

It can be written as a sum of positive squares in only one way, i.e., 143970160356 + 68051069956 = 379434^2 + 260866^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 212021230312.

It is not an unprimeable number, because it can be changed into a prime (212021230319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13251326887 + ... + 13251326902.

Almost surely, 2^212021230312 is an apocalyptic number.

It is an amenable number.

212021230312 is a deficient number, since it is larger than the sum of its proper divisors (185518576538).

212021230312 is a wasteful number, since it uses less digits than its factorization.

212021230312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26502653795 (or 26502653791 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212021230312 its reverse (213032120212), we get a palindrome (425053350524).

The spelling of 212021230312 in words is "two hundred twelve billion, twenty-one million, two hundred thirty thousand, three hundred twelve".