21011171612269 has 8 divisors (see below), whose sum is σ = 21307186572480. Its totient is φ = 20715158956800.

The previous prime is 21011171612261. The next prime is 21011171612297. The reversal of 21011171612269 is 96221617111012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21011171612269 - 2³ = 21011171612261 is a prime.

It is a super-2 number, since 2×21011171612269² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011171612261) 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 7 ways as a sum of consecutive naturals, for example, 27049234 + ... + 27815164.

It is an arithmetic number, because the mean of its divisors is an integer number (2663398321560).

Almost surely, 2^{21011171612269} is an apocalyptic number.

It is an amenable number.

21011171612269 is a deficient number, since it is larger than the sum of its proper divisors (296014960211).

21011171612269 is an equidigital number, since it uses as much as digits as its factorization.

21011171612269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152371.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 21011171612269 in words is "twenty-one trillion, eleven billion, one hundred seventy-one million, six hundred twelve thousand, two hundred sixty-nine".