121832821 has 8 divisors (see below), whose sum is σ = 137196288. Its totient is φ = 107184000.

The previous prime is 121832819. The next prime is 121832827. The reversal of 121832821 is 128238121.

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

It is not a de Polignac number, because 121832821 - 2¹ = 121832819 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 121832821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121832827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178300 + ... + 178981.

It is an arithmetic number, because the mean of its divisors is an integer number (17149536).

Almost surely, 2^121832821 is an apocalyptic number.

121832821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121832821 is a deficient number, since it is larger than the sum of its proper divisors (15363467).

121832821 is a wasteful number, since it uses less digits than its factorization.

121832821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357323.

The product of its digits is 1536, while the sum is 28.

The square root of 121832821 is about 11037.7905850763. The cubic root of 121832821 is about 495.7409181215.

The spelling of 121832821 in words is "one hundred twenty-one million, eight hundred thirty-two thousand, eight hundred twenty-one".