121340243 has 2 divisors, whose sum is σ = 121340244. Its totient is φ = 121340242.

The previous prime is 121340239. The next prime is 121340269. The reversal of 121340243 is 342043121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121340243 - 2² = 121340239 is a prime.

It is not a weakly prime, because it can be changed into another prime (121340743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670121 + 60670122.

It is an arithmetic number, because the mean of its divisors is an integer number (60670122).

Almost surely, 2^121340243 is an apocalyptic number.

121340243 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340243 is an equidigital number, since it uses as much as digits as its factorization.

121340243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 121340243 is about 11015.4547341451. The cubic root of 121340243 is about 495.0719114652.

Adding to 121340243 its reverse (342043121), we get a palindrome (463383364).

The spelling of 121340243 in words is "one hundred twenty-one million, three hundred forty thousand, two hundred forty-three".