21100011112 has 8 divisors (see below), whose sum is σ = 39562520850. Its totient is φ = 10550005552.

The previous prime is 21100011071. The next prime is 21100011143. The reversal of 21100011112 is 21111000112.

It can be written as a sum of positive squares in only one way, i.e., 21067361316 + 32649796 = 145146^2 + 5714^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1318750687 + ... + 1318750702.

Almost surely, 2^21100011112 is an apocalyptic number.

It is an amenable number.

21100011112 is a deficient number, since it is larger than the sum of its proper divisors (18462509738).

21100011112 is a wasteful number, since it uses less digits than its factorization.

21100011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637501395 (or 2637501391 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21100011112 its reverse (21111000112), we get a palindrome (42211011224).

The spelling of 21100011112 in words is "twenty-one billion, one hundred million, eleven thousand, one hundred twelve".