121110103 has 4 divisors (see below), whose sum is σ = 121150840. Its totient is φ = 121069368.

The previous prime is 121110089. The next prime is 121110109. The reversal of 121110103 is 301011121.

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-121110103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121110103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15525 + ... + 21982.

It is an arithmetic number, because the mean of its divisors is an integer number (30287710).

Almost surely, 2^121110103 is an apocalyptic number.

121110103 is a deficient number, since it is larger than the sum of its proper divisors (40737).

121110103 is an equidigital number, since it uses as much as digits as its factorization.

121110103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40736.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 121110103 is about 11005.0035438431. The cubic root of 121110103 is about 494.7587206253.

Adding to 121110103 its reverse (301011121), we get a palindrome (422121224).

It can be divided in two parts, 121 and 110103, that added together give a square (110224 = 332²).

The spelling of 121110103 in words is "one hundred twenty-one million, one hundred ten thousand, one hundred three".