121131120103 has 4 divisors (see below), whose sum is σ = 138435565840. Its totient is φ = 103826674368.

The previous prime is 121131120079. The next prime is 121131120107. The reversal of 121131120103 is 301021131121.

It is a happy number.

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 121131120103 - 2¹³ = 121131111911 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 (121131120107) 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, 8652222858 + ... + 8652222871.

It is an arithmetic number, because the mean of its divisors is an integer number (34608891460).

Almost surely, 2^121131120103 is an apocalyptic number.

121131120103 is a deficient number, since it is larger than the sum of its proper divisors (17304445737).

121131120103 is an equidigital number, since it uses as much as digits as its factorization.

121131120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17304445736.

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

Adding to 121131120103 its reverse (301021131121), we get a palindrome (422152251224).

The spelling of 121131120103 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred twenty thousand, one hundred three".