21130522344444 has 24 divisors (see below), whose sum is σ = 50140222513920. Its totient is φ = 6924125965744.

The previous prime is 21130522344401. The next prime is 21130522344461. The reversal of 21130522344444 is 44444322503112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14922684564 + ... + 14922685979.

It is an arithmetic number, because the mean of its divisors is an integer number (2089175938080).

Almost surely, 2^{21130522344444} is an apocalyptic number.

It is an amenable number.

21130522344444 is an abundant number, since it is smaller than the sum of its proper divisors (29009700169476).

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

21130522344444 is a wasteful number, since it uses less digits than its factorization.

21130522344444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29845370609 (or 29845370607 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

Adding to 21130522344444 its reverse (44444322503112), we get a palindrome (65574844847556).

The spelling of 21130522344444 in words is "twenty-one trillion, one hundred thirty billion, five hundred twenty-two million, three hundred forty-four thousand, four hundred forty-four".