43121222141 has 4 divisors (see below), whose sum is σ = 43828127484. Its totient is φ = 42414316800.

The previous prime is 43121222113. The next prime is 43121222189. The reversal of 43121222141 is 14122212134.

43121222141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2822265625 + 40298956516 = 53125^2 + 200746^2 .

It is a cyclic number.

It is not a de Polignac number, because 43121222141 - 2⁶ = 43121222077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43121222941) 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, 353452580 + ... + 353452701.

It is an arithmetic number, because the mean of its divisors is an integer number (10957031871).

Almost surely, 2^43121222141 is an apocalyptic number.

It is an amenable number.

43121222141 is a deficient number, since it is larger than the sum of its proper divisors (706905343).

43121222141 is an equidigital number, since it uses as much as digits as its factorization.

43121222141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706905342.

The product of its digits is 768, while the sum is 23.

Adding to 43121222141 its reverse (14122212134), we get a palindrome (57243434275).

The spelling of 43121222141 in words is "forty-three billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred forty-one".