12211313440 has 24 divisors (see below), whose sum is σ = 28849228380. Its totient is φ = 4884525312.

The previous prime is 12211313437. The next prime is 12211313461. The reversal of 12211313440 is 4431311221.

It can be written as a sum of positive squares in 2 ways, for example, as 11635505424 + 575808016 = 107868^2 + 23996^2 .

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 3 ways as a sum of consecutive naturals, for example, 38160195 + ... + 38160514.

Almost surely, 2^12211313440 is an apocalyptic number.

12211313440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211313440 is an abundant number, since it is smaller than the sum of its proper divisors (16637914940).

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

12211313440 is an equidigital number, since it uses as much as digits as its factorization.

12211313440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76320724 (or 76320716 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12211313440 its reverse (4431311221), we get a palindrome (16642624661).

The spelling of 12211313440 in words is "twelve billion, two hundred eleven million, three hundred thirteen thousand, four hundred forty".