121311203 has 8 divisors (see below), whose sum is σ = 130900896. Its totient is φ = 111758400.

The previous prime is 121311193. The next prime is 121311209. The reversal of 121311203 is 302113121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121311203 - 2⁴ = 121311187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121311209) 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 7 ways as a sum of consecutive naturals, for example, 2183 + ... + 15728.

It is an arithmetic number, because the mean of its divisors is an integer number (16362612).

Almost surely, 2^121311203 is an apocalyptic number.

121311203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121311203 is a deficient number, since it is larger than the sum of its proper divisors (9589693).

121311203 is a wasteful number, since it uses less digits than its factorization.

121311203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18445.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121311203 is about 11014.1365072347. The cubic root of 121311203 is about 495.0324136173.

Adding to 121311203 its reverse (302113121), we get a palindrome (423424324).

The spelling of 121311203 in words is "one hundred twenty-one million, three hundred eleven thousand, two hundred three".