131132231111 has 4 divisors (see below), whose sum is σ = 149865406992. Its totient is φ = 112399055232.

The previous prime is 131132231099. The next prime is 131132231171. The reversal of 131132231111 is 111132231131.

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 131132231111 - 2³⁰ = 130058489287 is a prime.

It is a super-2 number, since 2×131132231111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131132231171) 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, 9366587930 + ... + 9366587943.

It is an arithmetic number, because the mean of its divisors is an integer number (37466351748).

Almost surely, 2^131132231111 is an apocalyptic number.

131132231111 is a deficient number, since it is larger than the sum of its proper divisors (18733175881).

131132231111 is an equidigital number, since it uses as much as digits as its factorization.

131132231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18733175880.

The product of its digits is 108, while the sum is 20.

Adding to 131132231111 its sum of digits (20), we get a palindrome (131132231131).

Adding to 131132231111 its reverse (111132231131), we get a palindrome (242264462242).

The spelling of 131132231111 in words is "one hundred thirty-one billion, one hundred thirty-two million, two hundred thirty-one thousand, one hundred eleven".