21100012002112 has 56 divisors (see below), whose sum is σ = 42042649106304. Its totient is φ = 10506606968832.

The previous prime is 21100012002077. The next prime is 21100012002133. The reversal of 21100012002112 is 21120021000112.

It is a junction number, because it is equal to n+sod(n) for n = 21100012002092 and 21100012002101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74647993 + ... + 74930119.

It is an arithmetic number, because the mean of its divisors is an integer number (750761591184).

Almost surely, 2^{21100012002112} is an apocalyptic number.

It is an amenable number.

21100012002112 is a deficient number, since it is larger than the sum of its proper divisors (20942637104192).

21100012002112 is a wasteful number, since it uses less digits than its factorization.

21100012002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286943 (or 286933 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21100012002112 its reverse (21120021000112), we get a palindrome (42220033002224).

The spelling of 21100012002112 in words is "twenty-one trillion, one hundred billion, twelve million, two thousand, one hundred twelve".