212013301321 has 4 divisors (see below), whose sum is σ = 212027107972.
Its totient is φ = 211999494672.
The previous prime is 212013301303. The next prime is 212013301337. The reversal of 212013301321 is 123103310212.
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 108692199225 + 103321102096 = 329685^2 + 321436^2
It is a cyclic number.
It is not a de Polignac number, because 212013301321 - 211 = 212013299273 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (212013301391) 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, 6880266 + ... + 6911011.
It is an arithmetic number, because the mean of its divisors is an integer number (53006776993).
Almost surely, 2212013301321 is an apocalyptic number.
It is an amenable number.
212013301321 is a deficient number, since it is larger than the sum of its proper divisors (13806651).
212013301321 is a wasteful number, since it uses less digits than its factorization.
212013301321 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13806650.
The product of its (nonzero) digits is 216, while the sum is 19.
Adding to 212013301321 its reverse (123103310212), we get a palindrome (335116611533).
The spelling of 212013301321 in words is "two hundred twelve billion, thirteen million, three hundred one thousand, three hundred twenty-one".