121318 has 4 divisors (see below), whose sum is σ = 181980. Its totient is φ = 60658.

The previous prime is 121313. The next prime is 121321. The reversal of 121318 is 813121.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30328 + ... + 30331.

It is an arithmetic number, because the mean of its divisors is an integer number (45495).

2¹²¹³¹⁸ is an apocalyptic number.

121318 is a deficient number, since it is larger than the sum of its proper divisors (60662).

121318 is an equidigital number, since it uses as much as digits as its factorization.

121318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60661.

The product of its digits is 48, while the sum is 16.

The square root of 121318 is about 348.3073355530. The cubic root of 121318 is about 49.5041658909.

Adding to 121318 its reverse (813121), we get a palindrome (934439).

The spelling of 121318 in words is "one hundred twenty-one thousand, three hundred eighteen".