21342033241 has 4 divisors (see below), whose sum is σ = 21344139684. Its totient is φ = 21339926800.

The previous prime is 21342033221. The next prime is 21342033253. The reversal of 21342033241 is 14233024312.

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 10571952400 + 10770080841 = 102820^2 + 103779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21342033241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342033221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1037950 + ... + 1058311.

It is an arithmetic number, because the mean of its divisors is an integer number (5336034921).

Almost surely, 2^21342033241 is an apocalyptic number.

It is an amenable number.

21342033241 is a deficient number, since it is larger than the sum of its proper divisors (2106443).

21342033241 is a wasteful number, since it uses less digits than its factorization.

21342033241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106442.

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

Adding to 21342033241 its reverse (14233024312), we get a palindrome (35575057553).

It can be divided in two parts, 2134203 and 3241, that added together give a square (2137444 = 1462²).

The spelling of 21342033241 in words is "twenty-one billion, three hundred forty-two million, thirty-three thousand, two hundred forty-one".