131121135 has 12 divisors (see below), whose sum is σ = 227276712. Its totient is φ = 69931248.

The previous prime is 131121131. The next prime is 131121149. The reversal of 131121135 is 531121131.

It is not a de Polignac number, because 131121135 - 2² = 131121131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1456857 + ... + 1456946.

It is an arithmetic number, because the mean of its divisors is an integer number (18939726).

Almost surely, 2^131121135 is an apocalyptic number.

131121135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131121135 is a deficient number, since it is larger than the sum of its proper divisors (96155577).

131121135 is a wasteful number, since it uses less digits than its factorization.

131121135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913814 (or 2913811 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 131121135 is about 11450.8137265436. The cubic root of 131121135 is about 508.0318027809.

Adding to 131121135 its reverse (531121131), we get a palindrome (662242266).

The spelling of 131121135 in words is "one hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty-five".