21013177171 has 8 divisors (see below), whose sum is σ = 24119930720. Its totient is φ = 17932641408.

The previous prime is 21013177169. The next prime is 21013177183. The reversal of 21013177171 is 17177131012.

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 21013177171 - 2¹ = 21013177169 is a prime.

It is a super-3 number, since 3×21013177171³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013177151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6552726 + ... + 6555931.

It is an arithmetic number, because the mean of its divisors is an integer number (3014991340).

Almost surely, 2^21013177171 is an apocalyptic number.

21013177171 is a deficient number, since it is larger than the sum of its proper divisors (3106753549).

21013177171 is a wasteful number, since it uses less digits than its factorization.

21013177171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13108893.

The product of its (nonzero) digits is 2058, while the sum is 31.

The spelling of 21013177171 in words is "twenty-one billion, thirteen million, one hundred seventy-seven thousand, one hundred seventy-one".