212012221313 has 4 divisors (see below), whose sum is σ = 212054552580. Its totient is φ = 211969890048.

The previous prime is 212012221271. The next prime is 212012221321. The reversal of 212012221313 is 313122210212.

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 80172789904 + 131839431409 = 283148^2 + 363097^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012221313 - 2¹⁸ = 212011959169 is a prime.

It is a super-3 number, since 3×212012221313³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212012271313) 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, 21158120 + ... + 21168137.

It is an arithmetic number, because the mean of its divisors is an integer number (53013638145).

Almost surely, 2^212012221313 is an apocalyptic number.

It is an amenable number.

212012221313 is a deficient number, since it is larger than the sum of its proper divisors (42331267).

212012221313 is an equidigital number, since it uses as much as digits as its factorization.

212012221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42331266.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212012221313 its reverse (313122210212), we get a palindrome (525134431525).

The spelling of 212012221313 in words is "two hundred twelve billion, twelve million, two hundred twenty-one thousand, three hundred thirteen".