121125503 has 8 divisors (see below), whose sum is σ = 123140736. Its totient is φ = 119119000.

The previous prime is 121125479. The next prime is 121125553. The reversal of 121125503 is 305521121.

It is a happy number.

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 121125503 - 2²⁴ = 104348287 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 (121125553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29528 + ... + 33378.

It is an arithmetic number, because the mean of its divisors is an integer number (15392592).

Almost surely, 2^121125503 is an apocalyptic number.

121125503 is a deficient number, since it is larger than the sum of its proper divisors (2015233).

121125503 is an equidigital number, since it uses as much as digits as its factorization.

121125503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 121125503 is about 11005.7032033396. The cubic root of 121125503 is about 494.7796904184.

Adding to 121125503 its reverse (305521121), we get a palindrome (426646624).

The spelling of 121125503 in words is "one hundred twenty-one million, one hundred twenty-five thousand, five hundred three".