12211204040 has 128 divisors (see below), whose sum is σ = 33811603200. Its totient is φ = 3873546240.

The previous prime is 12211204039. The next prime is 12211204123. The reversal of 12211204040 is 4040211221.

It is a super-2 number, since 2×12211204040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259100 + ... + 302580.

It is an arithmetic number, because the mean of its divisors is an integer number (264153150).

Almost surely, 2^12211204040 is an apocalyptic number.

12211204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211204040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16905801600).

12211204040 is an abundant number, since it is smaller than the sum of its proper divisors (21600399160).

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

12211204040 is a wasteful number, since it uses less digits than its factorization.

12211204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43575 (or 43571 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12211204040 its reverse (4040211221), we get a palindrome (16251415261).

The spelling of 12211204040 in words is "twelve billion, two hundred eleven million, two hundred four thousand, forty".