211231023313 has 4 divisors (see below), whose sum is σ = 211233180340. Its totient is φ = 211228866288.

The previous prime is 211231023271. The next prime is 211231023317. The reversal of 211231023313 is 313320132112.

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 42875085969 + 168355937344 = 207063^2 + 410312^2 .

It is a cyclic number.

It is not a de Polignac number, because 211231023313 - 2²⁹ = 210694152401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211231023317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924270 + ... + 1129927.

It is an arithmetic number, because the mean of its divisors is an integer number (52808295085).

Almost surely, 2^211231023313 is an apocalyptic number.

It is an amenable number.

211231023313 is a deficient number, since it is larger than the sum of its proper divisors (2157027).

211231023313 is a wasteful number, since it uses less digits than its factorization.

211231023313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157026.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 211231023313 its reverse (313320132112), we get a palindrome (524551155425).

The spelling of 211231023313 in words is "two hundred eleven billion, two hundred thirty-one million, twenty-three thousand, three hundred thirteen".