21102101012112 has 40 divisors (see below), whose sum is σ = 57720452770656. Its totient is φ = 6620266983936.

The previous prime is 21102101012071. The next prime is 21102101012119. The reversal of 21102101012112 is 21121010120112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21102101012091 and 21102101012100.

It is not an unprimeable number, because it can be changed into a prime (21102101012119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12930208138 + ... + 12930209769.

Almost surely, 2^{21102101012112} is an apocalyptic number.

It is an amenable number.

21102101012112 is an abundant number, since it is smaller than the sum of its proper divisors (36618351758544).

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

21102101012112 is a wasteful number, since it uses less digits than its factorization.

21102101012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25860417935 (or 25860417929 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21102101012112 its reverse (21121010120112), we get a palindrome (42223111132224).

The spelling of 21102101012112 in words is "twenty-one trillion, one hundred two billion, one hundred one million, twelve thousand, one hundred twelve".