43211443004021 has 16 divisors (see below), whose sum is σ = 43299409044528. Its totient is φ = 43123586457600.

The previous prime is 43211443003997. The next prime is 43211443004033. The reversal of 43211443004021 is 12040034411234.

It can be written as a sum of positive squares in 8 ways, for example, as 1487207079121 + 41724235924900 = 1219511^2 + 6459430^2 .

It is a cyclic number.

It is not a de Polignac number, because 43211443004021 - 2⁶ = 43211443003957 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 (43211443004321) 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, 6840497555 + ... + 6840503871.

It is an arithmetic number, because the mean of its divisors is an integer number (2706213065283).

Almost surely, 2^{43211443004021} is an apocalyptic number.

It is an amenable number.

43211443004021 is a deficient number, since it is larger than the sum of its proper divisors (87966040507).

43211443004021 is a wasteful number, since it uses less digits than its factorization.

43211443004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12952.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 43211443004021 its reverse (12040034411234), we get a palindrome (55251477415255).

The spelling of 43211443004021 in words is "forty-three trillion, two hundred eleven billion, four hundred forty-three million, four thousand, twenty-one".