43122121 has 4 divisors (see below), whose sum is σ = 49282432. Its totient is φ = 36961812.

The previous prime is 43122113. The next prime is 43122137. The reversal of 43122121 is 12122134.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12122134 = 2 ⋅6061067.

It is a cyclic number.

It is not a de Polignac number, because 43122121 - 2³ = 43122113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43122095 and 43122104.

It is not an unprimeable number, because it can be changed into a prime (43126121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3080145 + ... + 3080158.

It is an arithmetic number, because the mean of its divisors is an integer number (12320608).

Almost surely, 2^43122121 is an apocalyptic number.

It is an amenable number.

43122121 is a deficient number, since it is larger than the sum of its proper divisors (6160311).

43122121 is an equidigital number, since it uses as much as digits as its factorization.

43122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160310.

The product of its digits is 96, while the sum is 16.

The square root of 43122121 is about 6566.7435613095. The cubic root of 43122121 is about 350.6711502934.

Adding to 43122121 its reverse (12122134), we get a palindrome (55244255).

The spelling of 43122121 in words is "forty-three million, one hundred twenty-two thousand, one hundred twenty-one".