12215444020 has 96 divisors (see below), whose sum is σ = 28356652800. Its totient is φ = 4392520704.

The previous prime is 12215444009. The next prime is 12215444023. The reversal of 12215444020 is 2044451221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215444023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1546441 + ... + 1554319.

It is an arithmetic number, because the mean of its divisors is an integer number (295381800).

Almost surely, 2^12215444020 is an apocalyptic number.

12215444020 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 12215444020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14178326400).

12215444020 is an abundant number, since it is smaller than the sum of its proper divisors (16141208780).

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

12215444020 is a wasteful number, since it uses less digits than its factorization.

12215444020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8057 (or 8055 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 12215444020 its reverse (2044451221), we get a palindrome (14259895241).

The spelling of 12215444020 in words is "twelve billion, two hundred fifteen million, four hundred forty-four thousand, twenty".