21441220105 has 8 divisors (see below), whose sum is σ = 25735125312. Its totient is φ = 17149201968.

The previous prime is 21441220061. The next prime is 21441220133. The reversal of 21441220105 is 50102214412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21441220105 - 2¹⁵ = 21441187337 is a prime.

It is a super-2 number, since 2×21441220105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446647 + ... + 492316.

It is an arithmetic number, because the mean of its divisors is an integer number (3216890664).

Almost surely, 2^21441220105 is an apocalyptic number.

It is an amenable number.

21441220105 is a deficient number, since it is larger than the sum of its proper divisors (4293905207).

21441220105 is an equidigital number, since it uses as much as digits as its factorization.

21441220105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943535.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21441220105 its reverse (50102214412), we get a palindrome (71543434517).

The spelling of 21441220105 in words is "twenty-one billion, four hundred forty-one million, two hundred twenty thousand, one hundred five".