21603266103361 has 4 divisors (see below), whose sum is σ = 21638856328192. Its totient is φ = 21567675878532.

The previous prime is 21603266103347. The next prime is 21603266103383. The reversal of 21603266103361 is 16330166230612.

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 21603266103361 - 2⁵ = 21603266103329 is a prime.

It is a super-2 number, since 2×21603266103361² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21603266103161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17795111505 + ... + 17795112718.

It is an arithmetic number, because the mean of its divisors is an integer number (5409714082048).

Almost surely, 2^{21603266103361} is an apocalyptic number.

It is an amenable number.

21603266103361 is a deficient number, since it is larger than the sum of its proper divisors (35590224831).

21603266103361 is an equidigital number, since it uses as much as digits as its factorization.

21603266103361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35590224830.

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 21603266103361 in words is "twenty-one trillion, six hundred three billion, two hundred sixty-six million, one hundred three thousand, three hundred sixty-one".