11172120216 has 32 divisors (see below), whose sum is σ = 28076544000. Its totient is φ = 3704540960.

The previous prime is 11172120187. The next prime is 11172120259. The reversal of 11172120216 is 61202127111.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214016 + ... + 1223183.

It is an arithmetic number, because the mean of its divisors is an integer number (877392000).

Almost surely, 2^11172120216 is an apocalyptic number.

It is an amenable number.

11172120216 is an abundant number, since it is smaller than the sum of its proper divisors (16904423784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11172120216 is a wasteful number, since it uses less digits than its factorization.

11172120216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437399 (or 2437395 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 24.

Adding to 11172120216 its reverse (61202127111), we get a palindrome (72374247327).

The spelling of 11172120216 in words is "eleven billion, one hundred seventy-two million, one hundred twenty thousand, two hundred sixteen".