21134321403415 has 16 divisors (see below), whose sum is σ = 27666838288800. Its totient is φ = 15370365416320.

The previous prime is 21134321403347. The next prime is 21134321403451. The reversal of 21134321403415 is 51430412343112.

It is not a de Polignac number, because 21134321403415 - 2⁷ = 21134321403287 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 28985097 + ... + 29705293.

It is an arithmetic number, because the mean of its divisors is an integer number (1729177393050).

Almost surely, 2^{21134321403415} is an apocalyptic number.

21134321403415 is a deficient number, since it is larger than the sum of its proper divisors (6532516885385).

21134321403415 is a wasteful number, since it uses less digits than its factorization.

21134321403415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253762.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 21134321403415 its reverse (51430412343112), we get a palindrome (72564733746527).

The spelling of 21134321403415 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred twenty-one million, four hundred three thousand, four hundred fifteen".