43221120121 has 8 divisors (see below), whose sum is σ = 43904488320. Its totient is φ = 42541624272.

The previous prime is 43221120091. The next prime is 43221120167. The reversal of 43221120121 is 12102112234.

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

It is a cyclic number.

It is not a de Polignac number, because 43221120121 - 2¹³ = 43221111929 is a prime.

It is a super-2 number, since 2×43221120121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43221120191) 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 7 ways as a sum of consecutive naturals, for example, 945585 + ... + 990238.

It is an arithmetic number, because the mean of its divisors is an integer number (5488061040).

Almost surely, 2^43221120121 is an apocalyptic number.

It is an amenable number.

43221120121 is a deficient number, since it is larger than the sum of its proper divisors (683368199).

43221120121 is a wasteful number, since it uses less digits than its factorization.

43221120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936175.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 43221120121 its reverse (12102112234), we get a palindrome (55323232355).

The spelling of 43221120121 in words is "forty-three billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twenty-one".