21410103065 has 12 divisors (see below), whose sum is σ = 27669965484. Its totient is φ = 15809666496.

The previous prime is 21410103061. The next prime is 21410103073. The reversal of 21410103065 is 56030101412.

It can be written as a sum of positive squares in 6 ways, for example, as 4703765056 + 16706338009 = 68584^2 + 129253^2 .

It is not a de Polignac number, because 21410103065 - 2² = 21410103061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21410103065.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410103061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1170611 + ... + 1188759.

It is an arithmetic number, because the mean of its divisors is an integer number (2305830457).

Almost surely, 2^21410103065 is an apocalyptic number.

It is an amenable number.

21410103065 is a deficient number, since it is larger than the sum of its proper divisors (6259862419).

21410103065 is an frugal number, since it uses more digits than its factorization.

21410103065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36316 (or 18167 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21410103065 its reverse (56030101412), we get a palindrome (77440204477).

The spelling of 21410103065 in words is "twenty-one billion, four hundred ten million, one hundred three thousand, sixty-five".