21112303171 has 8 divisors (see below), whose sum is σ = 21218608224. Its totient is φ = 21006195840.

The previous prime is 21112303141. The next prime is 21112303187. The reversal of 21112303171 is 17130321112.

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 21112303171 - 2⁵ = 21112303139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112303141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167035 + ... + 264811.

It is an arithmetic number, because the mean of its divisors is an integer number (2652326028).

Almost surely, 2^21112303171 is an apocalyptic number.

21112303171 is a deficient number, since it is larger than the sum of its proper divisors (106305053).

21112303171 is an equidigital number, since it uses as much as digits as its factorization.

21112303171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98861.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 21112303171 its reverse (17130321112), we get a palindrome (38242624283).

The spelling of 21112303171 in words is "twenty-one billion, one hundred twelve million, three hundred three thousand, one hundred seventy-one".