211311231213 has 8 divisors (see below), whose sum is σ = 283542884128. Its totient is φ = 139976866224.

The previous prime is 211311231203. The next prime is 211311231227. The reversal of 211311231213 is 312132113112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211311231213 - 2¹³ = 211311223021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211311231213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211311231203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224321431 + ... + 224322372.

It is an arithmetic number, because the mean of its divisors is an integer number (35442860516).

Almost surely, 2^211311231213 is an apocalyptic number.

It is an amenable number.

211311231213 is a deficient number, since it is larger than the sum of its proper divisors (72231652915).

211311231213 is a wasteful number, since it uses less digits than its factorization.

211311231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448643963.

The product of its digits is 216, while the sum is 21.

Adding to 211311231213 its reverse (312132113112), we get a palindrome (523443344325).

The spelling of 211311231213 in words is "two hundred eleven billion, three hundred eleven million, two hundred thirty-one thousand, two hundred thirteen".