12191910272 has 48 divisors (see below), whose sum is σ = 25578341100. Its totient is φ = 5772536064.

The previous prime is 12191910259. The next prime is 12191910277. The reversal of 12191910272 is 27201919121.

It is a super-2 number, since 2×12191910272² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12191910277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5444129 + ... + 5446367.

Almost surely, 2^12191910272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12191910272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12789170550).

12191910272 is an abundant number, since it is smaller than the sum of its proper divisors (13386430828).

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

12191910272 is an frugal number, since it uses more digits than its factorization.

12191910272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 35.

The spelling of 12191910272 in words is "twelve billion, one hundred ninety-one million, nine hundred ten thousand, two hundred seventy-two".