12220440440 has 32 divisors (see below), whose sum is σ = 29611068480. Its totient is φ = 4512162432.

The previous prime is 12220440371. The next prime is 12220440461. The reversal of 12220440440 is 4404402221.

It is a congruent number.

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, 11749904 + ... + 11750943.

It is an arithmetic number, because the mean of its divisors is an integer number (925345890).

Almost surely, 2^12220440440 is an apocalyptic number.

12220440440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220440440 is an abundant number, since it is smaller than the sum of its proper divisors (17390628040).

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

12220440440 is a wasteful number, since it uses less digits than its factorization.

12220440440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23500871 (or 23500867 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 12220440440 its reverse (4404402221), we get a palindrome (16624842661).

The spelling of 12220440440 in words is "twelve billion, two hundred twenty million, four hundred forty thousand, four hundred forty".