21112112044 has 12 divisors (see below), whose sum is σ = 36958438944. Its totient is φ = 10552558064.

The previous prime is 21112112039. The next prime is 21112112053. The reversal of 21112112044 is 44021121112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860887 + ... + 885070.

It is an arithmetic number, because the mean of its divisors is an integer number (3079869912).

Almost surely, 2^21112112044 is an apocalyptic number.

It is an amenable number.

21112112044 is a deficient number, since it is larger than the sum of its proper divisors (15846326900).

21112112044 is a wasteful number, since it uses less digits than its factorization.

21112112044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748984 (or 1748982 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21112112044 its reverse (44021121112), we get a palindrome (65133233156).

The spelling of 21112112044 in words is "twenty-one billion, one hundred twelve million, one hundred twelve thousand, forty-four".