212031222313 has 4 divisors (see below), whose sum is σ = 212033222740. Its totient is φ = 212029221888.

The previous prime is 212031222289. The next prime is 212031222343. The reversal of 212031222313 is 313222130212.

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 88993032489 + 123038189824 = 298317^2 + 350768^2 .

It is a cyclic number.

It is not a de Polignac number, because 212031222313 - 2⁵ = 212031222281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212031222343) 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, 831768 + ... + 1056361.

It is an arithmetic number, because the mean of its divisors is an integer number (53008305685).

Almost surely, 2^212031222313 is an apocalyptic number.

It is an amenable number.

212031222313 is a deficient number, since it is larger than the sum of its proper divisors (2000427).

212031222313 is a wasteful number, since it uses less digits than its factorization.

212031222313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000426.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212031222313 its reverse (313222130212), we get a palindrome (525253352525).

The spelling of 212031222313 in words is "two hundred twelve billion, thirty-one million, two hundred twenty-two thousand, three hundred thirteen".