21110112112 has 10 divisors (see below), whose sum is σ = 40900842248. Its totient is φ = 10555056048.

The previous prime is 21110112109. The next prime is 21110112113. The reversal of 21110112112 is 21121101112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110112092 and 21110112101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110112113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659690988 + ... + 659691019.

Almost surely, 2^21110112112 is an apocalyptic number.

It is an amenable number.

21110112112 is a deficient number, since it is larger than the sum of its proper divisors (19790730136).

21110112112 is a wasteful number, since it uses less digits than its factorization.

21110112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319382015 (or 1319382009 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110112112 its reverse (21121101112), we get a palindrome (42231213224).

The spelling of 21110112112 in words is "twenty-one billion, one hundred ten million, one hundred twelve thousand, one hundred twelve".