121660633 has 2 divisors, whose sum is σ = 121660634. Its totient is φ = 121660632.

The previous prime is 121660589. The next prime is 121660681. The reversal of 121660633 is 336066121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117787609 + 3873024 = 10853^2 + 1968^2 .

It is a cyclic number.

It is not a de Polignac number, because 121660633 - 2¹⁷ = 121529561 is a prime.

It is not a weakly prime, because it can be changed into another prime (121660733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60830316 + 60830317.

It is an arithmetic number, because the mean of its divisors is an integer number (60830317).

Almost surely, 2^121660633 is an apocalyptic number.

It is an amenable number.

121660633 is a deficient number, since it is larger than the sum of its proper divisors (1).

121660633 is an equidigital number, since it uses as much as digits as its factorization.

121660633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 121660633 is about 11029.9878966389. The cubic root of 121660633 is about 495.5072621934.

The spelling of 121660633 in words is "one hundred twenty-one million, six hundred sixty thousand, six hundred thirty-three".