21044413124442 has 12 divisors (see below), whose sum is σ = 45596228436330. Its totient is φ = 7014804374808.

The previous prime is 21044413124381. The next prime is 21044413124447. The reversal of 21044413124442 is 24442131444012.

21044413124442 is a `hidden beast` number, since 2 + 1 + 0 + 444 + 131 + 2 + 44 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14860631792601 + 6183781331841 = 3854949^2 + 2486721^2 .

It is a super-2 number, since 2×21044413124442² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21044413124397 and 21044413124406.

It is not an unprimeable number, because it can be changed into a prime (21044413124447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 584567031217 + ... + 584567031252.

Almost surely, 2^{21044413124442} is an apocalyptic number.

21044413124442 is an abundant number, since it is smaller than the sum of its proper divisors (24551815311888).

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

21044413124442 is a wasteful number, since it uses less digits than its factorization.

21044413124442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169134062477 (or 1169134062474 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 36.

Adding to 21044413124442 its reverse (24442131444012), we get a palindrome (45486544568454).

The spelling of 21044413124442 in words is "twenty-one trillion, forty-four billion, four hundred thirteen million, one hundred twenty-four thousand, four hundred forty-two".