21535552112132 has 12 divisors (see below), whose sum is σ = 38075744198940. Its totient is φ = 10656768055296.

The previous prime is 21535552112111. The next prime is 21535552112167. The reversal of 21535552112132 is 23121125553512.

It can be written as a sum of positive squares in 2 ways, for example, as 12944697319876 + 8590854792256 = 3597874^2 + 2931016^2 .

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, 27751999757 + ... + 27752000532.

It is an arithmetic number, because the mean of its divisors is an integer number (3172978683245).

Almost surely, 2^{21535552112132} is an apocalyptic number.

It is an amenable number.

21535552112132 is a deficient number, since it is larger than the sum of its proper divisors (16540192086808).

21535552112132 is a wasteful number, since it uses less digits than its factorization.

21535552112132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55504000390 (or 55504000388 counting only the distinct ones).

The product of its digits is 90000, while the sum is 38.

Adding to 21535552112132 its reverse (23121125553512), we get a palindrome (44656677665644).

The spelling of 21535552112132 in words is "twenty-one trillion, five hundred thirty-five billion, five hundred fifty-two million, one hundred twelve thousand, one hundred thirty-two".