21140242432471 has 2 divisors, whose sum is σ = 21140242432472. Its totient is φ = 21140242432470.

The previous prime is 21140242432297. The next prime is 21140242432493. The reversal of 21140242432471 is 17423424204112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21140242432471 - 2¹¹ = 21140242430423 is a prime.

It is a super-3 number, since 3×21140242432471³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21140242432471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21140242439471) 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 as a sum of consecutive naturals, namely, 10570121216235 + 10570121216236.

It is an arithmetic number, because the mean of its divisors is an integer number (10570121216236).

Almost surely, 2^{21140242432471} is an apocalyptic number.

21140242432471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140242432471 is an equidigital number, since it uses as much as digits as its factorization.

21140242432471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86016, while the sum is 37.

Adding to 21140242432471 its reverse (17423424204112), we get a palindrome (38563666636583).

The spelling of 21140242432471 in words is "twenty-one trillion, one hundred forty billion, two hundred forty-two million, four hundred thirty-two thousand, four hundred seventy-one".