11225212171 has 4 divisors (see below), whose sum is σ = 11226006792. Its totient is φ = 11224417552.

The previous prime is 11225212139. The next prime is 11225212177. The reversal of 11225212171 is 17121252211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11225212171 - 2⁵ = 11225212139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11225212177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375730 + ... + 404503.

It is an arithmetic number, because the mean of its divisors is an integer number (2806501698).

Almost surely, 2^11225212171 is an apocalyptic number.

11225212171 is a deficient number, since it is larger than the sum of its proper divisors (794621).

11225212171 is an equidigital number, since it uses as much as digits as its factorization.

11225212171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794620.

The product of its digits is 560, while the sum is 25.

Adding to 11225212171 its reverse (17121252211), we get a palindrome (28346464382).

The spelling of 11225212171 in words is "eleven billion, two hundred twenty-five million, two hundred twelve thousand, one hundred seventy-one".