121502243 has 2 divisors, whose sum is σ = 121502244. Its totient is φ = 121502242.

The previous prime is 121502239. The next prime is 121502273. The reversal of 121502243 is 342205121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121502243 - 2² = 121502239 is a prime.

It is not a weakly prime, because it can be changed into another prime (121502273) 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 as a sum of consecutive naturals, namely, 60751121 + 60751122.

It is an arithmetic number, because the mean of its divisors is an integer number (60751122).

Almost surely, 2^121502243 is an apocalyptic number.

121502243 is a deficient number, since it is larger than the sum of its proper divisors (1).

121502243 is an equidigital number, since it uses as much as digits as its factorization.

121502243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 121502243 is about 11022.8055866009. The cubic root of 121502243 is about 495.2921351438.

Adding to 121502243 its reverse (342205121), we get a palindrome (463707364).

The spelling of 121502243 in words is "one hundred twenty-one million, five hundred two thousand, two hundred forty-three".