121505633 has 2 divisors, whose sum is σ = 121505634. Its totient is φ = 121505632.

The previous prime is 121505617. The next prime is 121505663. The reversal of 121505633 is 336505121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106357969 + 15147664 = 10313^2 + 3892^2 .

It is a cyclic number.

It is not a de Polignac number, because 121505633 - 2⁴ = 121505617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121505663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60752816 + 60752817.

It is an arithmetic number, because the mean of its divisors is an integer number (60752817).

Almost surely, 2^121505633 is an apocalyptic number.

It is an amenable number.

121505633 is a deficient number, since it is larger than the sum of its proper divisors (1).

121505633 is an equidigital number, since it uses as much as digits as its factorization.

121505633 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 26.

The square root of 121505633 is about 11022.9593576317. The cubic root of 121505633 is about 495.2967414366.

The spelling of 121505633 in words is "one hundred twenty-one million, five hundred five thousand, six hundred thirty-three".