43022121 has 16 divisors (see below), whose sum is σ = 63379584. Its totient is φ = 25819904.

The previous prime is 43022117. The next prime is 43022129. The reversal of 43022121 is 12122034.

It is a cyclic number.

It is not a de Polignac number, because 43022121 - 2² = 43022117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43022121.

It is not an unprimeable number, because it can be changed into a prime (43022129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17166 + ... + 19511.

It is an arithmetic number, because the mean of its divisors is an integer number (3961224).

Almost surely, 2^43022121 is an apocalyptic number.

It is an amenable number.

43022121 is a deficient number, since it is larger than the sum of its proper divisors (20357463).

43022121 is a wasteful number, since it uses less digits than its factorization.

43022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36720.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 43022121 is about 6559.1250178663. The cubic root of 43022121 is about 350.3998722269.

Adding to 43022121 its reverse (12122034), we get a palindrome (55144155).

The spelling of 43022121 in words is "forty-three million, twenty-two thousand, one hundred twenty-one".