21103534354133 has 64 divisors (see below), whose sum is σ = 27332299653120. Its totient is φ = 15810740870400.

The previous prime is 21103534354121. The next prime is 21103534354157. The reversal of 21103534354133 is 33145343530112.

It is not a de Polignac number, because 21103534354133 - 2⁸ = 21103534353877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103534354433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1991457791 + ... + 1991468387.

It is an arithmetic number, because the mean of its divisors is an integer number (427067182080).

Almost surely, 2^{21103534354133} is an apocalyptic number.

It is an amenable number.

21103534354133 is a deficient number, since it is larger than the sum of its proper divisors (6228765298987).

21103534354133 is a wasteful number, since it uses less digits than its factorization.

21103534354133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14298.

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 21103534354133 its reverse (33145343530112), we get a palindrome (54248877884245).

The spelling of 21103534354133 in words is "twenty-one trillion, one hundred three billion, five hundred thirty-four million, three hundred fifty-four thousand, one hundred thirty-three".