21121321132 has 12 divisors (see below), whose sum is σ = 36964537456. Its totient is φ = 10560024720.

The previous prime is 21121321127. The next prime is 21121321141. The reversal of 21121321132 is 23112312112.

It is a super-2 number, since 2×21121321132² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79848 + ... + 220495.

Almost surely, 2^21121321132 is an apocalyptic number.

It is an amenable number.

21121321132 is a deficient number, since it is larger than the sum of its proper divisors (15843216324).

21121321132 is a wasteful number, since it uses less digits than its factorization.

21121321132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317928 (or 317926 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 21121321132 its reverse (23112312112), we get a palindrome (44233633244).

The spelling of 21121321132 in words is "twenty-one billion, one hundred twenty-one million, three hundred twenty-one thousand, one hundred thirty-two".