21166066112 has 28 divisors (see below), whose sum is σ = 43827563856. Its totient is φ = 10122900480.

The previous prime is 21166066079. The next prime is 21166066133.

21166066112 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 7188089 + ... + 7191032.

Almost surely, 2^21166066112 is an apocalyptic number.

It is an amenable number.

21166066112 is an abundant number, since it is smaller than the sum of its proper divisors (22661497744).

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

21166066112 is a wasteful number, since it uses less digits than its factorization.

21166066112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14379156 (or 14379146 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

It can be divided in two parts, 211660 and 66112, that added together give a palindrome (277772).

The spelling of 21166066112 in words is "twenty-one billion, one hundred sixty-six million, sixty-six thousand, one hundred twelve".