16521100112 has 20 divisors (see below), whose sum is σ = 34919598336. Its totient is φ = 7509590880.

The previous prime is 16521100111. The next prime is 16521100139. The reversal of 16521100112 is 21100112561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521100111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46934768 + ... + 46935119.

Almost surely, 2^16521100112 is an apocalyptic number.

It is an amenable number.

16521100112 is an abundant number, since it is smaller than the sum of its proper divisors (18398498224).

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

16521100112 is a wasteful number, since it uses less digits than its factorization.

16521100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93869906 (or 93869900 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 16521100112 its reverse (21100112561), we get a palindrome (37621212673).

The spelling of 16521100112 in words is "sixteen billion, five hundred twenty-one million, one hundred thousand, one hundred twelve".