121333643 has 2 divisors, whose sum is σ = 121333644. Its totient is φ = 121333642.

The previous prime is 121333627. The next prime is 121333657. The reversal of 121333643 is 346333121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121333643 - 2⁴ = 121333627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121333603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60666821 + 60666822.

It is an arithmetic number, because the mean of its divisors is an integer number (60666822).

Almost surely, 2^121333643 is an apocalyptic number.

121333643 is a deficient number, since it is larger than the sum of its proper divisors (1).

121333643 is an equidigital number, since it uses as much as digits as its factorization.

121333643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 26.

The square root of 121333643 is about 11015.1551509727. The cubic root of 121333643 is about 495.0629352350.

Adding to 121333643 its reverse (346333121), we get a palindrome (467666764).

The spelling of 121333643 in words is "one hundred twenty-one million, three hundred thirty-three thousand, six hundred forty-three".