131123220211 has 4 divisors (see below), whose sum is σ = 131207872000. Its totient is φ = 131038568424.

The previous prime is 131123220209. The next prime is 131123220233. The reversal of 131123220211 is 112022321131.

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

It is a cyclic number.

It is not a de Polignac number, because 131123220211 - 2¹ = 131123220209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131123220311) 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, 42323571 + ... + 42326668.

It is an arithmetic number, because the mean of its divisors is an integer number (32801968000).

Almost surely, 2^131123220211 is an apocalyptic number.

131123220211 is a deficient number, since it is larger than the sum of its proper divisors (84651789).

131123220211 is an equidigital number, since it uses as much as digits as its factorization.

131123220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84651788.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131123220211 its reverse (112022321131), we get a palindrome (243145541342).

It can be divided in two parts, 13112 and 3220211, that added together give a palindrome (3233323).

The spelling of 131123220211 in words is "one hundred thirty-one billion, one hundred twenty-three million, two hundred twenty thousand, two hundred eleven".