121331103 has 16 divisors (see below), whose sum is σ = 166465536. Its totient is φ = 78550560.

The previous prime is 121331069. The next prime is 121331107. The reversal of 121331103 is 301133121.

It is not a de Polignac number, because 121331103 - 2⁶ = 121331039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331107) 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 15 ways as a sum of consecutive naturals, for example, 109450 + ... + 110552.

It is an arithmetic number, because the mean of its divisors is an integer number (10404096).

Almost surely, 2^121331103 is an apocalyptic number.

121331103 is a deficient number, since it is larger than the sum of its proper divisors (45134433).

121331103 is a wasteful number, since it uses less digits than its factorization.

121331103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 121331103 is about 11015.0398546714. The cubic root of 121331103 is about 495.0594806597.

Adding to 121331103 its reverse (301133121), we get a palindrome (422464224).

The spelling of 121331103 in words is "one hundred twenty-one million, three hundred thirty-one thousand, one hundred three".