121305529 has 2 divisors, whose sum is σ = 121305530. Its totient is φ = 121305528.

The previous prime is 121305517. The next prime is 121305551. The reversal of 121305529 is 925503121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88266025 + 33039504 = 9395^2 + 5748^2 .

It is an emirp because it is prime and its reverse (925503121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121305529 - 2²¹ = 119208377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121305497 and 121305506.

It is not a weakly prime, because it can be changed into another prime (121305589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60652764 + 60652765.

It is an arithmetic number, because the mean of its divisors is an integer number (60652765).

Almost surely, 2^121305529 is an apocalyptic number.

It is an amenable number.

121305529 is a deficient number, since it is larger than the sum of its proper divisors (1).

121305529 is an equidigital number, since it uses as much as digits as its factorization.

121305529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 121305529 is about 11013.8789261549. The cubic root of 121305529 is about 495.0246955676.

The spelling of 121305529 in words is "one hundred twenty-one million, three hundred five thousand, five hundred twenty-nine".