121332513 has 4 divisors (see below), whose sum is σ = 161776688. Its totient is φ = 80888340.

The previous prime is 121332503. The next prime is 121332551. The reversal of 121332513 is 315233121.

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 121332513 - 2⁸ = 121332257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121332513.

It is not an unprimeable number, because it can be changed into a prime (121332503) 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, 20222083 + ... + 20222088.

It is an arithmetic number, because the mean of its divisors is an integer number (40444172).

Almost surely, 2^121332513 is an apocalyptic number.

It is an amenable number.

121332513 is a deficient number, since it is larger than the sum of its proper divisors (40444175).

121332513 is an equidigital number, since it uses as much as digits as its factorization.

121332513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40444174.

The product of its digits is 540, while the sum is 21.

The square root of 121332513 is about 11015.1038578853. The cubic root of 121332513 is about 495.0613983630.

Adding to 121332513 its reverse (315233121), we get a palindrome (436565634).

The spelling of 121332513 in words is "one hundred twenty-one million, three hundred thirty-two thousand, five hundred thirteen".