7911211112 has 48 divisors (see below), whose sum is σ = 17355210660. Its totient is φ = 3370891776.

The previous prime is 7911211111. The next prime is 7911211117. The reversal of 7911211112 is 2111121197.

It can be written as a sum of positive squares in 2 ways, for example, as 7752098116 + 159112996 = 88046^2 + 12614^2 .

It is a super-2 number, since 2×7911211112² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7911211111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9488 + ... + 126144.

Almost surely, 2^7911211112 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 7911211112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8677605330).

7911211112 is an abundant number, since it is smaller than the sum of its proper divisors (9443999548).

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

7911211112 is a wasteful number, since it uses less digits than its factorization.

7911211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116850 (or 116839 counting only the distinct ones).

The product of its digits is 252, while the sum is 26.

The square root of 7911211112 is about 88944.9892461627. The cubic root of 7911211112 is about 1992.5733828129.

The spelling of 7911211112 in words is "seven billion, nine hundred eleven million, two hundred eleven thousand, one hundred twelve".