121125055103 has 4 divisors (see below), whose sum is σ = 130442367048. Its totient is φ = 111807743160.

The previous prime is 121125055099. The next prime is 121125055169. The reversal of 121125055103 is 301550521121.

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 121125055103 - 2² = 121125055099 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 (121125055193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4658655953 + ... + 4658655978.

It is an arithmetic number, because the mean of its divisors is an integer number (32610591762).

Almost surely, 2^121125055103 is an apocalyptic number.

121125055103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121125055103 is a deficient number, since it is larger than the sum of its proper divisors (9317311945).

121125055103 is an equidigital number, since it uses as much as digits as its factorization.

121125055103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9317311944.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 121125055103 its reverse (301550521121), we get a palindrome (422675576224).

The spelling of 121125055103 in words is "one hundred twenty-one billion, one hundred twenty-five million, fifty-five thousand, one hundred three".