21011101112 has 16 divisors (see below), whose sum is σ = 40754291400. Its totient is φ = 10143290080.

The previous prime is 21011101103. The next prime is 21011101127. The reversal of 21011101112 is 21110111012.

It is a junction number, because it is equal to n+sod(n) for n = 21011101093 and 21011101102.

It is a congruent 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, 45282314 + ... + 45282777.

Almost surely, 2^21011101112 is an apocalyptic number.

It is an amenable number.

21011101112 is a deficient number, since it is larger than the sum of its proper divisors (19743190288).

21011101112 is a wasteful number, since it uses less digits than its factorization.

21011101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90565126 (or 90565122 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21011101112 its reverse (21110111012), we get a palindrome (42121212124).

The spelling of 21011101112 in words is "twenty-one billion, eleven million, one hundred one thousand, one hundred twelve".