21100221021112 has 16 divisors (see below), whose sum is σ = 39925876933800. Its totient is φ = 10453320505440.

The previous prime is 21100221021107. The next prime is 21100221021179. The reversal of 21100221021112 is 21112012200112.

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, 12098749714 + ... + 12098751457.

Almost surely, 2^{21100221021112} is an apocalyptic number.

It is an amenable number.

21100221021112 is a deficient number, since it is larger than the sum of its proper divisors (18825655912688).

21100221021112 is a wasteful number, since it uses less digits than its factorization.

21100221021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24197501286 (or 24197501282 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21100221021112 its reverse (21112012200112), we get a palindrome (42212233221224).

The spelling of 21100221021112 in words is "twenty-one trillion, one hundred billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".