21131152434135 has 12 divisors (see below), whose sum is σ = 36627330885912. Its totient is φ = 11269947964848.

The previous prime is 21131152434109. The next prime is 21131152434157. The reversal of 21131152434135 is 53143425113112.

21131152434135 is a `hidden beast` number, since 2 + 1 + 131 + 152 + 4 + 341 + 35 = 666.

It is not a de Polignac number, because 21131152434135 - 2⁵ = 21131152434103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21131152434135.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234790582557 + ... + 234790582646.

It is an arithmetic number, because the mean of its divisors is an integer number (3052277573826).

Almost surely, 2^{21131152434135} is an apocalyptic number.

21131152434135 is a deficient number, since it is larger than the sum of its proper divisors (15496178451777).

21131152434135 is a wasteful number, since it uses less digits than its factorization.

21131152434135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469581165214 (or 469581165211 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 21131152434135 its reverse (53143425113112), we get a palindrome (74274577547247).

The spelling of 21131152434135 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred fifty-two million, four hundred thirty-four thousand, one hundred thirty-five".