121503313 has 8 divisors (see below), whose sum is σ = 123125760. Its totient is φ = 119891520.

The previous prime is 121503299. The next prime is 121503323. The reversal of 121503313 is 313305121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121503313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121503323) 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, 21753 + ... + 26761.

It is an arithmetic number, because the mean of its divisors is an integer number (15390720).

Almost surely, 2^121503313 is an apocalyptic number.

It is an amenable number.

121503313 is a deficient number, since it is larger than the sum of its proper divisors (1622447).

121503313 is a wasteful number, since it uses less digits than its factorization.

121503313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 121503313 is about 11022.8541222317. The cubic root of 121503313 is about 495.2935890566.

Adding to 121503313 its reverse (313305121), we get a palindrome (434808434).

The spelling of 121503313 in words is "one hundred twenty-one million, five hundred three thousand, three hundred thirteen".