21444222420105 has 16 divisors (see below), whose sum is σ = 34310905763904. Its totient is φ = 11436868660160.

The previous prime is 21444222420091. The next prime is 21444222420107. The reversal of 21444222420105 is 50102422244412.

It is not a de Polignac number, because 21444222420105 - 2²¹ = 21444220322953 is a prime.

It is a super-2 number, since 2×21444222420105² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21444222420107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565807 + ... + 6573323.

It is an arithmetic number, because the mean of its divisors is an integer number (2144431610244).

Almost surely, 2^{21444222420105} is an apocalyptic number.

It is an amenable number.

21444222420105 is a deficient number, since it is larger than the sum of its proper divisors (12866683343799).

21444222420105 is a wasteful number, since it uses less digits than its factorization.

21444222420105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6245496.

The product of its (nonzero) digits is 40960, while the sum is 33.

Adding to 21444222420105 its reverse (50102422244412), we get a palindrome (71546644664517).

The spelling of 21444222420105 in words is "twenty-one trillion, four hundred forty-four billion, two hundred twenty-two million, four hundred twenty thousand, one hundred five".