21443513043124 has 12 divisors (see below), whose sum is σ = 37526191909024. Its totient is φ = 10721743926264.

The previous prime is 21443513043097. The next prime is 21443513043143. The reversal of 21443513043124 is 42134031534412.

It is a super-2 number, since 2×21443513043124² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417609 + ... + 6700495.

Almost surely, 2^{21443513043124} is an apocalyptic number.

It is an amenable number.

21443513043124 is a deficient number, since it is larger than the sum of its proper divisors (16082678865900).

21443513043124 is a wasteful number, since it uses less digits than its factorization.

21443513043124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297654 (or 6297652 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 21443513043124 its reverse (42134031534412), we get a palindrome (63577544577536).

The spelling of 21443513043124 in words is "twenty-one trillion, four hundred forty-three billion, five hundred thirteen million, forty-three thousand, one hundred twenty-four".