121533513 has 8 divisors (see below), whose sum is σ = 162566976. Its totient is φ = 80761200.

The previous prime is 121533487. The next prime is 121533613. The reversal of 121533513 is 315335121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121533513 - 2⁹ = 121533001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121533413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64198 + ... + 66063.

It is an arithmetic number, because the mean of its divisors is an integer number (20320872).

Almost surely, 2^121533513 is an apocalyptic number.

It is an amenable number.

121533513 is a deficient number, since it is larger than the sum of its proper divisors (41033463).

121533513 is a wasteful number, since it uses less digits than its factorization.

121533513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130575.

The product of its digits is 1350, while the sum is 24.

The square root of 121533513 is about 11024.2239182629. The cubic root of 121533513 is about 495.3346212088.

Adding to 121533513 its reverse (315335121), we get a palindrome (436868634).

The spelling of 121533513 in words is "one hundred twenty-one million, five hundred thirty-three thousand, five hundred thirteen".