12220420344 has 64 divisors (see below), whose sum is σ = 33401047680. Its totient is φ = 3695088000.

The previous prime is 12220420343. The next prime is 12220420351. The reversal of 12220420344 is 44302402221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220420343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71499 + ... + 171909.

It is an arithmetic number, because the mean of its divisors is an integer number (521891370).

Almost surely, 2^12220420344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220420344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16700523840).

12220420344 is an abundant number, since it is smaller than the sum of its proper divisors (21180627336).

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

12220420344 is a wasteful number, since it uses less digits than its factorization.

12220420344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100892 (or 100888 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 12220420344 its reverse (44302402221), we get a palindrome (56522822565).

The spelling of 12220420344 in words is "twelve billion, two hundred twenty million, four hundred twenty thousand, three hundred forty-four".