21134525113423 has 8 divisors (see below), whose sum is σ = 21275034549120. Its totient is φ = 20994022858200.

The previous prime is 21134525113417. The next prime is 21134525113483. The reversal of 21134525113423 is 32431152543112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21134525113423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134525113483) 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 7 ways as a sum of consecutive naturals, for example, 4176936 + ... + 7727602.

It is an arithmetic number, because the mean of its divisors is an integer number (2659379318640).

Almost surely, 2^{21134525113423} is an apocalyptic number.

21134525113423 is a deficient number, since it is larger than the sum of its proper divisors (140509435697).

21134525113423 is a wasteful number, since it uses less digits than its factorization.

21134525113423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590237.

The product of its digits is 86400, while the sum is 37.

Adding to 21134525113423 its reverse (32431152543112), we get a palindrome (53565677656535).

The spelling of 21134525113423 in words is "twenty-one trillion, one hundred thirty-four billion, five hundred twenty-five million, one hundred thirteen thousand, four hundred twenty-three".