43016121 has 12 divisors (see below), whose sum is σ = 62303280. Its totient is φ = 28599480.

The previous prime is 43016119. The next prime is 43016147. The reversal of 43016121 is 12161034.

It is a happy number.

It is not a de Polignac number, because 43016121 - 2¹ = 43016119 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 43016094 and 43016103.

It is not an unprimeable number, because it can be changed into a prime (43016111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2895 + ... + 9716.

It is an arithmetic number, because the mean of its divisors is an integer number (5191940).

Almost surely, 2^43016121 is an apocalyptic number.

It is an amenable number.

43016121 is a deficient number, since it is larger than the sum of its proper divisors (19287159).

43016121 is a wasteful number, since it uses less digits than its factorization.

43016121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12996 (or 12993 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 43016121 is about 6558.6676238395. The cubic root of 43016121 is about 350.3835821810.

Adding to 43016121 its reverse (12161034), we get a palindrome (55177155).

The spelling of 43016121 in words is "forty-three million, sixteen thousand, one hundred twenty-one".