21603271770411 has 16 divisors (see below), whose sum is σ = 29811102726048. Its totient is φ = 13906053734400.

The previous prime is 21603271770391. The next prime is 21603271770427. The reversal of 21603271770411 is 11407717230612.

It is not a de Polignac number, because 21603271770411 - 2¹⁸ = 21603271508267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21603271770211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905330110 + ... + 905353971.

It is an arithmetic number, because the mean of its divisors is an integer number (1863193920378).

Almost surely, 2^{21603271770411} is an apocalyptic number.

21603271770411 is a deficient number, since it is larger than the sum of its proper divisors (8207830955637).

21603271770411 is a wasteful number, since it uses less digits than its factorization.

21603271770411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810684222.

The product of its (nonzero) digits is 98784, while the sum is 42.

The spelling of 21603271770411 in words is "twenty-one trillion, six hundred three billion, two hundred seventy-one million, seven hundred seventy thousand, four hundred eleven".