433340221021 has 4 divisors (see below), whose sum is σ = 433341563292. Its totient is φ = 433338878752.

The previous prime is 433340221009. The next prime is 433340221057. The reversal of 433340221021 is 120122043334.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 301236322500 + 132103898521 = 548850^2 + 363461^2 .

It is a cyclic number.

It is not a de Polignac number, because 433340221021 - 2¹³ = 433340212829 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 (433340221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139521 + ... + 941353.

It is an arithmetic number, because the mean of its divisors is an integer number (108335390823).

Almost surely, 2^433340221021 is an apocalyptic number.

It is an amenable number.

433340221021 is a deficient number, since it is larger than the sum of its proper divisors (1342271).

433340221021 is an equidigital number, since it uses as much as digits as its factorization.

433340221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342270.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 433340221021 its reverse (120122043334), we get a palindrome (553462264355).

The spelling of 433340221021 in words is "four hundred thirty-three billion, three hundred forty million, two hundred twenty-one thousand, twenty-one".