21101002112 has 32 divisors (see below), whose sum is σ = 42358080600. Its totient is φ = 10469954560.

The previous prime is 21101002099. The next prime is 21101002129. The reversal of 21101002112 is 21120010112.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 21101002093 and 21101002102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612437 + ... + 645972.

Almost surely, 2^21101002112 is an apocalyptic number.

It is an amenable number.

21101002112 is an abundant number, since it is smaller than the sum of its proper divisors (21257078488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101002112 is a wasteful number, since it uses less digits than its factorization.

21101002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258554 (or 1258542 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21101002112 its reverse (21120010112), we get a palindrome (42221012224).

The spelling of 21101002112 in words is "twenty-one billion, one hundred one million, two thousand, one hundred twelve".