131125111 has 4 divisors (see below), whose sum is σ = 141211672. Its totient is φ = 121038552.

The previous prime is 131125091. The next prime is 131125117. The reversal of 131125111 is 111521131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111521131 = 8011 ⋅13921.

It is a cyclic number.

It is not a de Polignac number, because 131125111 - 2⁹ = 131124599 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 (131125117) 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, 5043261 + ... + 5043286.

It is an arithmetic number, because the mean of its divisors is an integer number (35302918).

Almost surely, 2^131125111 is an apocalyptic number.

131125111 is a deficient number, since it is larger than the sum of its proper divisors (10086561).

131125111 is a wasteful number, since it uses less digits than its factorization.

131125111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10086560.

The product of its digits is 30, while the sum is 16.

The square root of 131125111 is about 11450.9873373434. The cubic root of 131125111 is about 508.0369377630.

Adding to 131125111 its reverse (111521131), we get a palindrome (242646242).

The spelling of 131125111 in words is "one hundred thirty-one million, one hundred twenty-five thousand, one hundred eleven".