21141231124244 has 48 divisors (see below), whose sum is σ = 46557409651200. Its totient is φ = 8159863438560.

The previous prime is 21141231124207. The next prime is 21141231124253. The reversal of 21141231124244 is 44242113214112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21141231124244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320716394 + ... + 320782305.

It is an arithmetic number, because the mean of its divisors is an integer number (969946034400).

Almost surely, 2^{21141231124244} is an apocalyptic number.

It is an amenable number.

21141231124244 is an abundant number, since it is smaller than the sum of its proper divisors (25416178526956).

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

21141231124244 is a wasteful number, since it uses less digits than its factorization.

21141231124244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641498828 (or 641498826 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

Adding to 21141231124244 its reverse (44242113214112), we get a palindrome (65383344338356).

The spelling of 21141231124244 in words is "twenty-one trillion, one hundred forty-one billion, two hundred thirty-one million, one hundred twenty-four thousand, two hundred forty-four".