131111010111 has 4 divisors (see below), whose sum is σ = 174814680152. Its totient is φ = 87407340072.

The previous prime is 131111010097. The next prime is 131111010131. The reversal of 131111010111 is 111010111131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111010111131 = 3 ⋅37003370377.

It is not a de Polignac number, because 131111010111 - 2⁶ = 131111010047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131111010131) 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, 21851835016 + ... + 21851835021.

It is an arithmetic number, because the mean of its divisors is an integer number (43703670038).

Almost surely, 2^131111010111 is an apocalyptic number.

131111010111 is a deficient number, since it is larger than the sum of its proper divisors (43703670041).

131111010111 is an equidigital number, since it uses as much as digits as its factorization.

131111010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43703670040.

The product of its (nonzero) digits is 3, while the sum is 12.

Adding to 131111010111 its reverse (111010111131), we get a palindrome (242121121242).

It can be divided in two parts, 131 and 111010111, that multiplied together give a palindrome (14542324541).

The spelling of 131111010111 in words is "one hundred thirty-one billion, one hundred eleven million, ten thousand, one hundred eleven".