211313031233311 has 4 divisors (see below), whose sum is σ = 241500607123792. Its totient is φ = 181125455342832.

The previous prime is 211313031233257. The next prime is 211313031233357. The reversal of 211313031233311 is 113332130313112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 211313031233311 - 2⁹ = 211313031232799 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 211313031233311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211313031233111) 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, 15093787945230 + ... + 15093787945243.

It is an arithmetic number, because the mean of its divisors is an integer number (60375151780948).

Almost surely, 2^{211313031233311} is an apocalyptic number.

211313031233311 is a deficient number, since it is larger than the sum of its proper divisors (30187575890481).

211313031233311 is an equidigital number, since it uses as much as digits as its factorization.

211313031233311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30187575890480.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 211313031233311 its reverse (113332130313112), we get a palindrome (324645161546423).

The spelling of 211313031233311 in words is "two hundred eleven trillion, three hundred thirteen billion, thirty-one million, two hundred thirty-three thousand, three hundred eleven".