12211166540 has 24 divisors (see below), whose sum is σ = 25646674032. Its totient is φ = 4883852480.

The previous prime is 12211166431. The next prime is 12211166593. The reversal of 12211166540 is 4566111221.

It is a super-2 number, since 2×12211166540² (a number of 21 digits) contains 22 as substring.

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, 146342 + ... + 214098.

It is an arithmetic number, because the mean of its divisors is an integer number (1068611418).

Almost surely, 2^12211166540 is an apocalyptic number.

12211166540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211166540 is an abundant number, since it is smaller than the sum of its proper divisors (13435507492).

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

12211166540 is a wasteful number, since it uses less digits than its factorization.

12211166540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76777 (or 76775 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 12211166540 its reverse (4566111221), we get a palindrome (16777277761).

The spelling of 12211166540 in words is "twelve billion, two hundred eleven million, one hundred sixty-six thousand, five hundred forty".