121329633 has 4 divisors (see below), whose sum is σ = 161772848. Its totient is φ = 80886420.

The previous prime is 121329553. The next prime is 121329641. The reversal of 121329633 is 336923121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121329633 - 2²¹ = 119232481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121329633.

It is not an unprimeable number, because it can be changed into a prime (121329653) 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 in 3 ways as a sum of consecutive naturals, for example, 20221603 + ... + 20221608.

It is an arithmetic number, because the mean of its divisors is an integer number (40443212).

Almost surely, 2^121329633 is an apocalyptic number.

It is an amenable number.

121329633 is a deficient number, since it is larger than the sum of its proper divisors (40443215).

121329633 is an equidigital number, since it uses as much as digits as its factorization.

121329633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40443214.

The product of its digits is 5832, while the sum is 30.

The square root of 121329633 is about 11014.9731275206. The cubic root of 121329633 is about 495.0574813362.

The spelling of 121329633 in words is "one hundred twenty-one million, three hundred twenty-nine thousand, six hundred thirty-three".