121475521 has 2 divisors, whose sum is σ = 121475522. Its totient is φ = 121475520.

The previous prime is 121475509. The next prime is 121475527. The reversal of 121475521 is 125574121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118374400 + 3101121 = 10880^2 + 1761^2 .

It is a cyclic number.

It is not a de Polignac number, because 121475521 - 2⁹ = 121475009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121475521.

It is not a weakly prime, because it can be changed into another prime (121475527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60737760 + 60737761.

It is an arithmetic number, because the mean of its divisors is an integer number (60737761).

Almost surely, 2^121475521 is an apocalyptic number.

It is an amenable number.

121475521 is a deficient number, since it is larger than the sum of its proper divisors (1).

121475521 is an equidigital number, since it uses as much as digits as its factorization.

121475521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2800, while the sum is 28.

The square root of 121475521 is about 11021.5933966011. The cubic root of 121475521 is about 495.2558225992.

The spelling of 121475521 in words is "one hundred twenty-one million, four hundred seventy-five thousand, five hundred twenty-one".