10121503 has 4 divisors (see below), whose sum is σ = 11567440. Its totient is φ = 8675568.

The previous prime is 10121491. The next prime is 10121521. The reversal of 10121503 is 30512101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722958 + ... + 722971.

It is an arithmetic number, because the mean of its divisors is an integer number (2891860).

Almost surely, 2^10121503 is an apocalyptic number.

10121503 is a deficient number, since it is larger than the sum of its proper divisors (1445937).

10121503 is an equidigital number, since it uses as much as digits as its factorization.

10121503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445936.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 10121503 is about 3181.4309673479. The cubic root of 10121503 is about 216.3125262745.

Adding to 10121503 its reverse (30512101), we get a palindrome (40633604).

The spelling of 10121503 in words is "ten million, one hundred twenty-one thousand, five hundred three".