21271332562 has 8 divisors (see below), whose sum is σ = 31925330892. Its totient is φ = 10629555600.

The previous prime is 21271332559. The next prime is 21271332601. The reversal of 21271332562 is 26523317212.

It can be written as a sum of positive squares in 2 ways, for example, as 20929119561 + 342213001 = 144669^2 + 18499^2 .

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

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, 3050989 + ... + 3057952.

Almost surely, 2^21271332562 is an apocalyptic number.

21271332562 is a deficient number, since it is larger than the sum of its proper divisors (10653998330).

21271332562 is a wasteful number, since it uses less digits than its factorization.

21271332562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110684.

The product of its digits is 30240, while the sum is 34.

Adding to 21271332562 its reverse (26523317212), we get a palindrome (47794649774).

The spelling of 21271332562 in words is "twenty-one billion, two hundred seventy-one million, three hundred thirty-two thousand, five hundred sixty-two".