121610603 has 4 divisors (see below), whose sum is σ = 121648128. Its totient is φ = 121573080.

The previous prime is 121610563. The next prime is 121610647. The reversal of 121610603 is 306016121.

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

It is a cyclic number.

It is not a de Polignac number, because 121610603 - 2⁶ = 121610539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121610693) 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 3 ways as a sum of consecutive naturals, for example, 13388 + ... + 20553.

It is an arithmetic number, because the mean of its divisors is an integer number (30412032).

Almost surely, 2^121610603 is an apocalyptic number.

121610603 is a deficient number, since it is larger than the sum of its proper divisors (37525).

121610603 is an equidigital number, since it uses as much as digits as its factorization.

121610603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37524.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 121610603 is about 11027.7197552350. The cubic root of 121610603 is about 495.4393310787.

Adding to 121610603 its reverse (306016121), we get a palindrome (427626724).

The spelling of 121610603 in words is "one hundred twenty-one million, six hundred ten thousand, six hundred three".