43242224021 has 2 divisors, whose sum is σ = 43242224022.
Its totient is φ = 43242224020.
The previous prime is 43242223967. The next prime is 43242224023. The reversal of 43242224021 is 12042224234.
Adding to 43242224021 its reverse (12042224234), we get a palindrome (55284448255).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 31396296100 + 11845927921 = 177190^2 + 108839^2
It is a cyclic number.
It is not a de Polignac number, because 43242224021 - 222 = 43238029717 is a prime.
Together with 43242224023, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (43242224023) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621112010 + 21621112011.
It is an arithmetic number, because the mean of its divisors is an integer number (21621112011).
Almost surely, 243242224021 is an apocalyptic number.
It is an amenable number.
43242224021 is a deficient number, since it is larger than the sum of its proper divisors (1).
43242224021 is an equidigital number, since it uses as much as digits as its factorization.
43242224021 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 6144, while the sum is 26.
The spelling of 43242224021 in words is "forty-three billion, two hundred forty-two million, two hundred twenty-four thousand, twenty-one".