21103565341 has 4 divisors (see below), whose sum is σ = 21104127072. Its totient is φ = 21103003612.

The previous prime is 21103565317. The next prime is 21103565369. The reversal of 21103565341 is 14356530112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21103565341 - 2²¹ = 21101468189 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 (21103565941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220135 + ... + 301108.

It is an arithmetic number, because the mean of its divisors is an integer number (5276031768).

Almost surely, 2^21103565341 is an apocalyptic number.

It is an amenable number.

21103565341 is a deficient number, since it is larger than the sum of its proper divisors (561731).

21103565341 is an equidigital number, since it uses as much as digits as its factorization.

21103565341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561730.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 21103565341 in words is "twenty-one billion, one hundred three million, five hundred sixty-five thousand, three hundred forty-one".