211313113131 has 4 divisors (see below), whose sum is σ = 281750817512. Its totient is φ = 140875408752.

The previous prime is 211313113127. The next prime is 211313113133. The reversal of 211313113131 is 131311313112.

211313113131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 211313113131 - 2² = 211313113127 is a prime.

It is a super-2 number, since 2×211313113131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211313113098 and 211313113107.

It is not an unprimeable number, because it can be changed into a prime (211313113133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35218852186 + ... + 35218852191.

It is an arithmetic number, because the mean of its divisors is an integer number (70437704378).

Almost surely, 2^211313113131 is an apocalyptic number.

211313113131 is a deficient number, since it is larger than the sum of its proper divisors (70437704381).

211313113131 is an equidigital number, since it uses as much as digits as its factorization.

211313113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70437704380.

The product of its digits is 162, while the sum is 21.

Adding to 211313113131 its reverse (131311313112), we get a palindrome (342624426243).

The spelling of 211313113131 in words is "two hundred eleven billion, three hundred thirteen million, one hundred thirteen thousand, one hundred thirty-one".