212012523365 has 4 divisors (see below), whose sum is σ = 254415028044. Its totient is φ = 169610018688.

The previous prime is 212012523361. The next prime is 212012523403. The reversal of 212012523365 is 563325210212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61535251969 + 150477271396 = 248063^2 + 387914^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012523365 - 2² = 212012523361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012523361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21201252332 + ... + 21201252341.

It is an arithmetic number, because the mean of its divisors is an integer number (63603757011).

Almost surely, 2^212012523365 is an apocalyptic number.

It is an amenable number.

212012523365 is a deficient number, since it is larger than the sum of its proper divisors (42402504679).

212012523365 is an equidigital number, since it uses as much as digits as its factorization.

212012523365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42402504678.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 212012523365 its reverse (563325210212), we get a palindrome (775337733577).

The spelling of 212012523365 in words is "two hundred twelve billion, twelve million, five hundred twenty-three thousand, three hundred sixty-five".