21134230140244 has 24 divisors (see below), whose sum is σ = 39830139021960. Its totient is φ = 9754200369024.

The previous prime is 21134230140241. The next prime is 21134230140259. The reversal of 21134230140244 is 44204103243112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1934847616144 + 19199382524100 = 1390988^2 + 4381710^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134230140241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7987362 + ... + 10298854.

It is an arithmetic number, because the mean of its divisors is an integer number (1659589125915).

Almost surely, 2^{21134230140244} is an apocalyptic number.

It is an amenable number.

21134230140244 is a deficient number, since it is larger than the sum of its proper divisors (18695908881716).

21134230140244 is a wasteful number, since it uses less digits than its factorization.

21134230140244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487339 (or 2487337 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21134230140244 its reverse (44204103243112), we get a palindrome (65338333383356).

The spelling of 21134230140244 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred thirty million, one hundred forty thousand, two hundred forty-four".