21004212345134 has 16 divisors (see below), whose sum is σ = 32285679296640. Its totient is φ = 10243026150840.

The previous prime is 21004212345133. The next prime is 21004212345173. The reversal of 21004212345134 is 43154321240012.

It is a self number, because there is not a number n which added to its sum of digits gives 21004212345134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004212345133) 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, 176666354 + ... + 176785205.

It is an arithmetic number, because the mean of its divisors is an integer number (2017854956040).

Almost surely, 2^{21004212345134} is an apocalyptic number.

21004212345134 is a deficient number, since it is larger than the sum of its proper divisors (11281466951506).

21004212345134 is a wasteful number, since it uses less digits than its factorization.

21004212345134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353452295.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 21004212345134 its reverse (43154321240012), we get a palindrome (64158533585146).

The spelling of 21004212345134 in words is "twenty-one trillion, four billion, two hundred twelve million, three hundred forty-five thousand, one hundred thirty-four".