21101102112 has 48 divisors (see below), whose sum is σ = 55399014720. Its totient is φ = 7032605952.

The previous prime is 21101102051. The next prime is 21101102173. The reversal of 21101102112 is 21120110112.

It is an interprime number because it is at equal distance from previous prime (21101102051) and next prime (21101102173).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 810189 + ... + 835827.

It is an arithmetic number, because the mean of its divisors is an integer number (1154146140).

Almost surely, 2^21101102112 is an apocalyptic number.

It is an amenable number.

21101102112 is an abundant number, since it is smaller than the sum of its proper divisors (34297912608).

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

21101102112 is a wasteful number, since it uses less digits than its factorization.

21101102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34225 (or 34217 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21101102112 its reverse (21120110112), we get a palindrome (42221212224).

The spelling of 21101102112 in words is "twenty-one billion, one hundred one million, one hundred two thousand, one hundred twelve".