43002244100021 has 6 divisors (see below), whose sum is σ = 44536212380322. Its totient is φ = 41519408095760.

The previous prime is 43002244099987. The next prime is 43002244100029. The reversal of 43002244100021 is 12000144220034.

It can be written as a sum of positive squares in 3 ways, for example, as 8130561799396 + 34871682300625 = 2851414^2 + 5905225^2 .

It is not a de Polignac number, because 43002244100021 - 2¹⁴ = 43002244083637 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 43002244100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43002244100029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25566137150 + ... + 25566138831.

It is an arithmetic number, because the mean of its divisors is an integer number (7422702063387).

Almost surely, 2^{43002244100021} is an apocalyptic number.

It is an amenable number.

43002244100021 is a deficient number, since it is larger than the sum of its proper divisors (1533968280301).

43002244100021 is an equidigital number, since it uses as much as digits as its factorization.

43002244100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51132276039 (or 51132276010 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 43002244100021 its reverse (12000144220034), we get a palindrome (55002388320055).

The spelling of 43002244100021 in words is "forty-three trillion, two billion, two hundred forty-four million, one hundred thousand, twenty-one".