113121533 has 4 divisors (see below), whose sum is σ = 129281760. Its totient is φ = 96961308.

The previous prime is 113121529. The next prime is 113121559. The reversal of 113121533 is 335121311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 335121311 = 7 ⋅47874473.

It is a cyclic number.

It is not a de Polignac number, because 113121533 - 2² = 113121529 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 (113121523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8080103 + ... + 8080116.

It is an arithmetic number, because the mean of its divisors is an integer number (32320440).

Almost surely, 2^113121533 is an apocalyptic number.

It is an amenable number.

113121533 is a deficient number, since it is larger than the sum of its proper divisors (16160227).

113121533 is an equidigital number, since it uses as much as digits as its factorization.

113121533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16160226.

The product of its digits is 270, while the sum is 20.

The square root of 113121533 is about 10635.8607080010. The cubic root of 113121533 is about 483.6320727351.

Adding to 113121533 its reverse (335121311), we get a palindrome (448242844).

The spelling of 113121533 in words is "one hundred thirteen million, one hundred twenty-one thousand, five hundred thirty-three".