12110091820 has 24 divisors (see below), whose sum is σ = 25474103424. Its totient is φ = 4835863296.

The previous prime is 12110091781. The next prime is 12110091827. The reversal of 12110091820 is 2819001121.

It is not an unprimeable number, because it can be changed into a prime (12110091827) 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, 498684 + ... + 522403.

It is an arithmetic number, because the mean of its divisors is an integer number (1061420976).

Almost surely, 2^12110091820 is an apocalyptic number.

12110091820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12110091820 is an abundant number, since it is smaller than the sum of its proper divisors (13364011604).

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

12110091820 is a wasteful number, since it uses less digits than its factorization.

12110091820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021689 (or 1021687 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 12110091820 its reverse (2819001121), we get a palindrome (14929092941).

The spelling of 12110091820 in words is "twelve billion, one hundred ten million, ninety-one thousand, eight hundred twenty".