212152122313 has 4 divisors (see below), whose sum is σ = 213324233668. Its totient is φ = 210980010960.

The previous prime is 212152122307. The next prime is 212152122317. The reversal of 212152122313 is 313221251212.

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 5552783289 + 206599339024 = 74517^2 + 454532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212152122313 is a prime.

It is a super-2 number, since 2×212152122313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212152122317) 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, 586055406 + ... + 586055767.

It is an arithmetic number, because the mean of its divisors is an integer number (53331058417).

Almost surely, 2^212152122313 is an apocalyptic number.

It is an amenable number.

212152122313 is a deficient number, since it is larger than the sum of its proper divisors (1172111355).

212152122313 is a wasteful number, since it uses less digits than its factorization.

212152122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172111354.

The product of its digits is 1440, while the sum is 25.

Adding to 212152122313 its reverse (313221251212), we get a palindrome (525373373525).

The spelling of 212152122313 in words is "two hundred twelve billion, one hundred fifty-two million, one hundred twenty-two thousand, three hundred thirteen".