21101280966 has 48 divisors (see below), whose sum is σ = 46071795120. Its totient is φ = 6979737600.

The previous prime is 21101280961. The next prime is 21101280989. The reversal of 21101280966 is 66908210112.

It is a self number, because there is not a number n which added to its sum of digits gives 21101280966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101280961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1413441 + ... + 1428291.

It is an arithmetic number, because the mean of its divisors is an integer number (959829065).

Almost surely, 2^21101280966 is an apocalyptic number.

21101280966 is an abundant number, since it is smaller than the sum of its proper divisors (24970514154).

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

21101280966 is a wasteful number, since it uses less digits than its factorization.

21101280966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15461 (or 15458 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 21101280966 in words is "twenty-one billion, one hundred one million, two hundred eighty thousand, nine hundred sixty-six".