21335424420511 has 8 divisors (see below), whose sum is σ = 21376093750704. Its totient is φ = 21294761167680.

The previous prime is 21335424420509. The next prime is 21335424420581. The reversal of 21335424420511 is 11502442453312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21335424420511 - 2¹ = 21335424420509 is a prime.

It is a super-2 number, since 2×21335424420511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335424420581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5539851 + ... + 8565091.

It is an arithmetic number, because the mean of its divisors is an integer number (2672011718838).

Almost surely, 2^{21335424420511} is an apocalyptic number.

21335424420511 is a deficient number, since it is larger than the sum of its proper divisors (40669330193).

21335424420511 is a wasteful number, since it uses less digits than its factorization.

21335424420511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038681.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 21335424420511 its reverse (11502442453312), we get a palindrome (32837866873823).

The spelling of 21335424420511 in words is "twenty-one trillion, three hundred thirty-five billion, four hundred twenty-four million, four hundred twenty thousand, five hundred eleven".