21441220103 has 6 divisors (see below), whose sum is σ = 22413979224. Its totient is φ = 20508992636.

The previous prime is 21441220061. The next prime is 21441220133. The reversal of 21441220103 is 30102214412.

It is not a de Polignac number, because 21441220103 - 2¹⁸ = 21440957959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441220133) 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, 20265275 + ... + 20266332.

It is an arithmetic number, because the mean of its divisors is an integer number (3735663204).

Almost surely, 2^21441220103 is an apocalyptic number.

21441220103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21441220103 is a deficient number, since it is larger than the sum of its proper divisors (972759121).

21441220103 is an equidigital number, since it uses as much as digits as its factorization.

21441220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40531653 (or 40531630 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21441220103 its reverse (30102214412), we get a palindrome (51543434515).

The spelling of 21441220103 in words is "twenty-one billion, four hundred forty-one million, two hundred twenty thousand, one hundred three".