212120121313 has 4 divisors (see below), whose sum is σ = 212122279620. Its totient is φ = 212117963008.

The previous prime is 212120121307. The next prime is 212120121319. The reversal of 212120121313 is 313121021212.

212120121313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (212120121307) and next prime (212120121319).

It can be written as a sum of positive squares in 2 ways, for example, as 116480229264 + 95639892049 = 341292^2 + 309257^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120121313 - 2⁹ = 212120120801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120121319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924328 + ... + 1130761.

It is an arithmetic number, because the mean of its divisors is an integer number (53030569905).

Almost surely, 2^212120121313 is an apocalyptic number.

It is an amenable number.

212120121313 is a deficient number, since it is larger than the sum of its proper divisors (2158307).

212120121313 is a wasteful number, since it uses less digits than its factorization.

212120121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158306.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212120121313 its reverse (313121021212), we get a palindrome (525241142525).

The spelling of 212120121313 in words is "two hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, three hundred thirteen".