21120112102 has 8 divisors (see below), whose sum is σ = 31681135800. Its totient is φ = 10559733504.

The previous prime is 21120112081. The next prime is 21120112133. The reversal of 21120112102 is 20121102112.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 68827 + ... + 216742.

It is an arithmetic number, because the mean of its divisors is an integer number (3960141975).

Almost surely, 2^21120112102 is an apocalyptic number.

21120112102 is a deficient number, since it is larger than the sum of its proper divisors (10561023698).

21120112102 is a wasteful number, since it uses less digits than its factorization.

21120112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322550.

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

Adding to 21120112102 its reverse (20121102112), we get a palindrome (41241214214).

The spelling of 21120112102 in words is "twenty-one billion, one hundred twenty million, one hundred twelve thousand, one hundred two".