121611103 has 4 divisors (see below), whose sum is σ = 121646448. Its totient is φ = 121575760.

The previous prime is 121611079. The next prime is 121611107. The reversal of 121611103 is 301116121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301116121 = 17 ⋅17712713.

It is a cyclic number.

It is not a de Polignac number, because 121611103 - 2²⁵ = 88056671 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 (121611107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11878 + ... + 19603.

It is an arithmetic number, because the mean of its divisors is an integer number (30411612).

Almost surely, 2^121611103 is an apocalyptic number.

121611103 is a deficient number, since it is larger than the sum of its proper divisors (35345).

121611103 is an equidigital number, since it uses as much as digits as its factorization.

121611103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35344.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 121611103 is about 11027.7424253562. The cubic root of 121611103 is about 495.4400100747.

Adding to 121611103 its reverse (301116121), we get a palindrome (422727224).

The spelling of 121611103 in words is "one hundred twenty-one million, six hundred eleven thousand, one hundred three".