121535507 has 2 divisors, whose sum is σ = 121535508. Its totient is φ = 121535506.

The previous prime is 121535503. The next prime is 121535509. The reversal of 121535507 is 705535121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (705535121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121535507 - 2² = 121535503 is a prime.

Together with 121535509, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121535507.

It is not a weakly prime, because it can be changed into another prime (121535503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60767753 + 60767754.

It is an arithmetic number, because the mean of its divisors is an integer number (60767754).

Almost surely, 2^121535507 is an apocalyptic number.

121535507 is a deficient number, since it is larger than the sum of its proper divisors (1).

121535507 is an equidigital number, since it uses as much as digits as its factorization.

121535507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 121535507 is about 11024.3143550971. The cubic root of 121535507 is about 495.3373301786.

The spelling of 121535507 in words is "one hundred twenty-one million, five hundred thirty-five thousand, five hundred seven".