121315503 has 8 divisors (see below), whose sum is σ = 162356400. Its totient is φ = 80575808.

The previous prime is 121315487. The next prime is 121315511. The reversal of 121315503 is 305513121.

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

It is a cyclic number.

It is not a de Polignac number, because 121315503 - 2⁴ = 121315487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121315503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315003) 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, 74358 + ... + 75971.

It is an arithmetic number, because the mean of its divisors is an integer number (20294550).

Almost surely, 2^121315503 is an apocalyptic number.

121315503 is a deficient number, since it is larger than the sum of its proper divisors (41040897).

121315503 is a wasteful number, since it uses less digits than its factorization.

121315503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150601.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 121315503 is about 11014.3317091869. The cubic root of 121315503 is about 495.0382625254.

Adding to 121315503 its reverse (305513121), we get a palindrome (426828624).

The spelling of 121315503 in words is "one hundred twenty-one million, three hundred fifteen thousand, five hundred three".