43121341213 has 4 divisors (see below), whose sum is σ = 43828248508. Its totient is φ = 42414433920.

The previous prime is 43121341201. The next prime is 43121341261. The reversal of 43121341213 is 31214312134.

43121341213 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 22236177924 + 20885163289 = 149118^2 + 144517^2 .

It is a cyclic number.

It is not a de Polignac number, because 43121341213 - 2⁵ = 43121341181 is a prime.

It is a super-2 number, since 2×43121341213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43121345213) 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, 353453556 + ... + 353453677.

It is an arithmetic number, because the mean of its divisors is an integer number (10957062127).

Almost surely, 2^43121341213 is an apocalyptic number.

It is an amenable number.

43121341213 is a deficient number, since it is larger than the sum of its proper divisors (706907295).

43121341213 is an equidigital number, since it uses as much as digits as its factorization.

43121341213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706907294.

The product of its digits is 1728, while the sum is 25.

Adding to 43121341213 its reverse (31214312134), we get a palindrome (74335653347).

The spelling of 43121341213 in words is "forty-three billion, one hundred twenty-one million, three hundred forty-one thousand, two hundred thirteen".