121342503 has 16 divisors (see below), whose sum is σ = 169090560. Its totient is φ = 77255904.

The previous prime is 121342483. The next prime is 121342519. The reversal of 121342503 is 305243121.

It is not a de Polignac number, because 121342503 - 2⁹ = 121341991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121342503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121342703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66933 + ... + 68721.

It is an arithmetic number, because the mean of its divisors is an integer number (10568160).

Almost surely, 2^121342503 is an apocalyptic number.

121342503 is a deficient number, since it is larger than the sum of its proper divisors (47748057).

121342503 is a wasteful number, since it uses less digits than its factorization.

121342503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 121342503 is about 11015.5573168133. The cubic root of 121342503 is about 495.0749850692.

Adding to 121342503 its reverse (305243121), we get a palindrome (426585624).

The spelling of 121342503 in words is "one hundred twenty-one million, three hundred forty-two thousand, five hundred three".