121100243 has 8 divisors (see below), whose sum is σ = 139062720. Its totient is φ = 104296680.

The previous prime is 121100233. The next prime is 121100249. The reversal of 121100243 is 342001121.

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

It is a cyclic number.

It is not a de Polignac number, because 121100243 - 2⁸ = 121099987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100249) 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 7 ways as a sum of consecutive naturals, for example, 289505 + ... + 289922.

It is an arithmetic number, because the mean of its divisors is an integer number (17382840).

Almost surely, 2^121100243 is an apocalyptic number.

121100243 is a deficient number, since it is larger than the sum of its proper divisors (17962477).

121100243 is a wasteful number, since it uses less digits than its factorization.

121100243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579457.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121100243 is about 11004.5555566774. Note that the first 5 decimals coincide. The cubic root of 121100243 is about 494.7452935777.

Adding to 121100243 its reverse (342001121), we get a palindrome (463101364).

The spelling of 121100243 in words is "one hundred twenty-one million, one hundred thousand, two hundred forty-three".