121613133 has 4 divisors (see below), whose sum is σ = 162150848. Its totient is φ = 81075420.

The previous prime is 121613113. The next prime is 121613143. The reversal of 121613133 is 331316121.

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.

It is not a de Polignac number, because 121613133 - 2⁶ = 121613069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121613113) 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, 20268853 + ... + 20268858.

It is an arithmetic number, because the mean of its divisors is an integer number (40537712).

Almost surely, 2^121613133 is an apocalyptic number.

It is an amenable number.

121613133 is a deficient number, since it is larger than the sum of its proper divisors (40537715).

121613133 is an equidigital number, since it uses as much as digits as its factorization.

121613133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40537714.

The product of its digits is 324, while the sum is 21.

The square root of 121613133 is about 11027.8344655694. The cubic root of 121613133 is about 495.4427667792.

Adding to 121613133 its reverse (331316121), we get a palindrome (452929254).

The spelling of 121613133 in words is "one hundred twenty-one million, six hundred thirteen thousand, one hundred thirty-three".