21010450005135 has 48 divisors (see below), whose sum is σ = 39421269168480. Its totient is φ = 10615806293760.

The previous prime is 21010450005113. The next prime is 21010450005313. The reversal of 21010450005135 is 53150005401012.

21010450005135 is a `hidden beast` number, since 2 + 1 + 0 + 104 + 500 + 0 + 51 + 3 + 5 = 666.

It is not a de Polignac number, because 21010450005135 - 2¹² = 21010450001039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21010450005099 and 21010450005108.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 215509386 + ... + 215606855.

It is an arithmetic number, because the mean of its divisors is an integer number (821276441010).

Almost surely, 2^{21010450005135} is an apocalyptic number.

21010450005135 is a deficient number, since it is larger than the sum of its proper divisors (18410819163345).

21010450005135 is a wasteful number, since it uses less digits than its factorization.

21010450005135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431116293 (or 431116268 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 21010450005135 its reverse (53150005401012), we get a palindrome (74160455406147).

The spelling of 21010450005135 in words is "twenty-one trillion, ten billion, four hundred fifty million, five thousand, one hundred thirty-five".