21044312134 has 8 divisors (see below), whose sum is σ = 32238095328. Its totient is φ = 10298280360.

The previous prime is 21044312119. The next prime is 21044312153. The reversal of 21044312134 is 43121344012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21044312099 and 21044312108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111937737 + ... + 111937924.

It is an arithmetic number, because the mean of its divisors is an integer number (4029761916).

Almost surely, 2^21044312134 is an apocalyptic number.

21044312134 is a deficient number, since it is larger than the sum of its proper divisors (11193783194).

21044312134 is a wasteful number, since it uses less digits than its factorization.

21044312134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223875710.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21044312134 its reverse (43121344012), we get a palindrome (64165656146).

The spelling of 21044312134 in words is "twenty-one billion, forty-four million, three hundred twelve thousand, one hundred thirty-four".