121436501 has 2 divisors, whose sum is σ = 121436502. Its totient is φ = 121436500.

The previous prime is 121436477. The next prime is 121436503. The reversal of 121436501 is 105634121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 106276 = 11015^2 + 326^2 .

It is an emirp because it is prime and its reverse (105634121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121436501 - 2⁶ = 121436437 is a prime.

Together with 121436503, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121436503) 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, 60718250 + 60718251.

It is an arithmetic number, because the mean of its divisors is an integer number (60718251).

Almost surely, 2^121436501 is an apocalyptic number.

It is an amenable number.

121436501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121436501 is an equidigital number, since it uses as much as digits as its factorization.

121436501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 121436501 is about 11019.8230929539. The cubic root of 121436501 is about 495.2027887271.

The spelling of 121436501 in words is "one hundred twenty-one million, four hundred thirty-six thousand, five hundred one".