43001202121 has 4 divisors (see below), whose sum is σ = 43019925012. Its totient is φ = 42982479232.

The previous prime is 43001202119. The next prime is 43001202163. The reversal of 43001202121 is 12120210034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6944888896 + 36056313225 = 83336^2 + 189885^2 .

It is a cyclic number.

It is not a de Polignac number, because 43001202121 - 2¹ = 43001202119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43001202095 and 43001202104.

It is not an unprimeable number, because it can be changed into a prime (43001202421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9358000 + ... + 9362593.

It is an arithmetic number, because the mean of its divisors is an integer number (10754981253).

Almost surely, 2^43001202121 is an apocalyptic number.

It is an amenable number.

43001202121 is a deficient number, since it is larger than the sum of its proper divisors (18722891).

43001202121 is a wasteful number, since it uses less digits than its factorization.

43001202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18722890.

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

Adding to 43001202121 its reverse (12120210034), we get a palindrome (55121412155).

The spelling of 43001202121 in words is "forty-three billion, one million, two hundred two thousand, one hundred twenty-one".