21440421130132 has 12 divisors (see below), whose sum is σ = 37522134638100. Its totient is φ = 10719811233536.

The previous prime is 21440421130091. The next prime is 21440421130157. The reversal of 21440421130132 is 23103112404412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2240302471696 + 19200118658436 = 1496764^2 + 4381794^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21440421130132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99712063 + ... + 99926854.

It is an arithmetic number, because the mean of its divisors is an integer number (3126844553175).

Almost surely, 2^{21440421130132} is an apocalyptic number.

It is an amenable number.

21440421130132 is a deficient number, since it is larger than the sum of its proper divisors (16081713507968).

21440421130132 is a wasteful number, since it uses less digits than its factorization.

21440421130132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199665770 (or 199665768 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21440421130132 its reverse (23103112404412), we get a palindrome (44543533534544).

The spelling of 21440421130132 in words is "twenty-one trillion, four hundred forty billion, four hundred twenty-one million, one hundred thirty thousand, one hundred thirty-two".