43321120121 has 8 divisors (see below), whose sum is σ = 43813446600. Its totient is φ = 42830519040.

The previous prime is 43321120099. The next prime is 43321120201. The reversal of 43321120121 is 12102112334.

43321120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21752896 + 43299367225 = 4664^2 + 208085^2 .

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 43321120121 - 2¹⁸ = 43320857977 is a prime.

It is a super-2 number, since 2×43321120121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43321120093 and 43321120102.

It is not an unprimeable number, because it can be changed into a prime (43321120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380816 + ... + 481313.

It is an arithmetic number, because the mean of its divisors is an integer number (5476680825).

Almost surely, 2^43321120121 is an apocalyptic number.

It is an amenable number.

43321120121 is a deficient number, since it is larger than the sum of its proper divisors (492326479).

43321120121 is a wasteful number, since it uses less digits than its factorization.

43321120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862699.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 43321120121 its reverse (12102112334), we get a palindrome (55423232455).

The spelling of 43321120121 in words is "forty-three billion, three hundred twenty-one million, one hundred twenty thousand, one hundred twenty-one".