43011142021 has 4 divisors (see below), whose sum is σ = 43015496044. Its totient is φ = 43006788000.

The previous prime is 43011141977. The next prime is 43011142033. The reversal of 43011142021 is 12024111034.

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 33113080900 + 9898061121 = 181970^2 + 99489^2 .

It is a cyclic number.

It is not a de Polignac number, because 43011142021 - 2¹¹ = 43011139973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43011142021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43011142081) 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, 2162160 + ... + 2181961.

It is an arithmetic number, because the mean of its divisors is an integer number (10753874011).

Almost surely, 2^43011142021 is an apocalyptic number.

It is an amenable number.

43011142021 is a deficient number, since it is larger than the sum of its proper divisors (4354023).

43011142021 is an equidigital number, since it uses as much as digits as its factorization.

43011142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354022.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 43011142021 its reverse (12024111034), we get a palindrome (55035253055).

The spelling of 43011142021 in words is "forty-three billion, eleven million, one hundred forty-two thousand, twenty-one".