21100020012112 has 20 divisors (see below), whose sum is σ = 40892141369376. Its totient is φ = 10547209336160.

The previous prime is 21100020012103. The next prime is 21100020012161. The reversal of 21100020012112 is 21121002000112.

It is a junction number, because it is equal to n+sod(n) for n = 21100020012092 and 21100020012101.

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, 174979714 + ... + 175100257.

Almost surely, 2^{21100020012112} is an apocalyptic number.

It is an amenable number.

21100020012112 is a deficient number, since it is larger than the sum of its proper divisors (19792121357264).

21100020012112 is a wasteful number, since it uses less digits than its factorization.

21100020012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350083746 (or 350083740 counting only the distinct ones).

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

Adding to 21100020012112 its reverse (21121002000112), we get a palindrome (42221022012224).

The spelling of 21100020012112 in words is "twenty-one trillion, one hundred billion, twenty million, twelve thousand, one hundred twelve".