121808633 has 2 divisors, whose sum is σ = 121808634. Its totient is φ = 121808632.

The previous prime is 121808629. The next prime is 121808653. The reversal of 121808633 is 336808121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68343289 + 53465344 = 8267^2 + 7312^2 .

It is a cyclic number.

It is not a de Polignac number, because 121808633 - 2² = 121808629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121808633.

It is not a weakly prime, because it can be changed into another prime (121808653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60904316 + 60904317.

It is an arithmetic number, because the mean of its divisors is an integer number (60904317).

Almost surely, 2^121808633 is an apocalyptic number.

It is an amenable number.

121808633 is a deficient number, since it is larger than the sum of its proper divisors (1).

121808633 is an equidigital number, since it uses as much as digits as its factorization.

121808633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 121808633 is about 11036.6948403949. The cubic root of 121808633 is about 495.7081087497.

The spelling of 121808633 in words is "one hundred twenty-one million, eight hundred eight thousand, six hundred thirty-three".