121329645 has 8 divisors (see below), whose sum is σ = 194127456. Its totient is φ = 64709136.

The previous prime is 121329641. The next prime is 121329647. The reversal of 121329645 is 546923121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121329645 - 2² = 121329641 is a prime.

It is a super-3 number, since 3×121329645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121329641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4044307 + ... + 4044336.

It is an arithmetic number, because the mean of its divisors is an integer number (24265932).

Almost surely, 2^121329645 is an apocalyptic number.

121329645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121329645 is a deficient number, since it is larger than the sum of its proper divisors (72797811).

121329645 is an equidigital number, since it uses as much as digits as its factorization.

121329645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088651.

The product of its digits is 12960, while the sum is 33.

The square root of 121329645 is about 11014.9736722336. The cubic root of 121329645 is about 495.0574976573.

The spelling of 121329645 in words is "one hundred twenty-one million, three hundred twenty-nine thousand, six hundred forty-five".