21113130044 has 12 divisors (see below), whose sum is σ = 36950088168. Its totient is φ = 10555962000.

The previous prime is 21113130037. The next prime is 21113130079. The reversal of 21113130044 is 44003131112.

It is a junction number, because it is equal to n+sod(n) for n = 21113129998 and 21113130025.

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, 66782 + ... + 216069.

It is an arithmetic number, because the mean of its divisors is an integer number (3079174014).

Almost surely, 2^21113130044 is an apocalyptic number.

It is an amenable number.

21113130044 is a deficient number, since it is larger than the sum of its proper divisors (15836958124).

21113130044 is a wasteful number, since it uses less digits than its factorization.

21113130044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301516 (or 301514 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21113130044 its reverse (44003131112), we get a palindrome (65116261156).

The spelling of 21113130044 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty thousand, forty-four".