133121103 has 4 divisors (see below), whose sum is σ = 177494808. Its totient is φ = 88747400.

The previous prime is 133121063. The next prime is 133121111. The reversal of 133121103 is 301121331.

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 133121103 - 2⁶ = 133121039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133121123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22186848 + ... + 22186853.

It is an arithmetic number, because the mean of its divisors is an integer number (44373702).

Almost surely, 2^133121103 is an apocalyptic number.

133121103 is a deficient number, since it is larger than the sum of its proper divisors (44373705).

133121103 is an equidigital number, since it uses as much as digits as its factorization.

133121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44373704.

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

The square root of 133121103 is about 11537.8118809417. The cubic root of 133121103 is about 510.6017541417.

Adding to 133121103 its reverse (301121331), we get a palindrome (434242434).

The spelling of 133121103 in words is "one hundred thirty-three million, one hundred twenty-one thousand, one hundred three".