21202231130244 has 18 divisors (see below), whose sum is σ = 53594528690430. Its totient is φ = 7067410376736.

The previous prime is 21202231130219. The next prime is 21202231130281. The reversal of 21202231130244 is 44203113220212.

21202231130244 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 2 + 2 + 311 + 302 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20703300807744 + 498930322500 = 4550088^2 + 706350^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 294475432329 + ... + 294475432400.

It is an arithmetic number, because the mean of its divisors is an integer number (2977473816135).

Almost surely, 2^{21202231130244} is an apocalyptic number.

It is an amenable number.

21202231130244 is an abundant number, since it is smaller than the sum of its proper divisors (32392297560186).

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

21202231130244 is a wasteful number, since it uses less digits than its factorization.

21202231130244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588950864739 (or 588950864734 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21202231130244 its reverse (44203113220212), we get a palindrome (65405344350456).

The spelling of 21202231130244 in words is "twenty-one trillion, two hundred two billion, two hundred thirty-one million, one hundred thirty thousand, two hundred forty-four".