121502137 has 2 divisors, whose sum is σ = 121502138. Its totient is φ = 121502136.

The previous prime is 121502041. The next prime is 121502159. The reversal of 121502137 is 731205121.

It is a happy number.

It is an a-pointer prime, because the next prime (121502159) can be obtained adding 121502137 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114511401 + 6990736 = 10701^2 + 2644^2 .

It is a cyclic number.

It is not a de Polignac number, because 121502137 - 2¹¹ = 121500089 is a prime.

It is not a weakly prime, because it can be changed into another prime (121502737) 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 as a sum of consecutive naturals, namely, 60751068 + 60751069.

It is an arithmetic number, because the mean of its divisors is an integer number (60751069).

Almost surely, 2^121502137 is an apocalyptic number.

It is an amenable number.

121502137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121502137 is an equidigital number, since it uses as much as digits as its factorization.

121502137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 121502137 is about 11022.8007783866. The cubic root of 121502137 is about 495.2919911108.

Adding to 121502137 its reverse (731205121), we get a palindrome (852707258).

The spelling of 121502137 in words is "one hundred twenty-one million, five hundred two thousand, one hundred thirty-seven".