21041443550124 has 18 divisors (see below), whose sum is σ = 53188093418460. Its totient is φ = 7013814516696.

The previous prime is 21041443550069. The next prime is 21041443550167. The reversal of 21041443550124 is 42105534414012.

21041443550124 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 144 + 3 + 5 + 501 + 2 + 4 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 584484543059 = 21041443550124 / (2 + 1 + 0 + 4 + 1 + 4 + 4 + 3 + 5 + 5 + 0 + 1 + 2 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 292242271494 + ... + 292242271565.

Almost surely, 2^{21041443550124} is an apocalyptic number.

It is an amenable number.

21041443550124 is an abundant number, since it is smaller than the sum of its proper divisors (32146649868336).

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

21041443550124 is a wasteful number, since it uses less digits than its factorization.

21041443550124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584484543069 (or 584484543064 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 21041443550124 its reverse (42105534414012), we get a palindrome (63146977964136).

The spelling of 21041443550124 in words is "twenty-one trillion, forty-one billion, four hundred forty-three million, five hundred fifty thousand, one hundred twenty-four".