12222432420 has 96 divisors (see below), whose sum is σ = 37511341056. Its totient is φ = 2948937600.

The previous prime is 12222432419. The next prime is 12222432427. The reversal of 12222432420 is 2423422221.

It is a super-2 number, since 2×12222432420² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12222432427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95377 + ... + 183143.

It is an arithmetic number, because the mean of its divisors is an integer number (390743136).

Almost surely, 2^12222432420 is an apocalyptic number.

12222432420 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 12222432420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18755670528).

12222432420 is an abundant number, since it is smaller than the sum of its proper divisors (25288908636).

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

12222432420 is a wasteful number, since it uses less digits than its factorization.

12222432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88001 (or 87999 counting only the distinct ones).

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

Adding to 12222432420 its reverse (2423422221), we get a palindrome (14645854641).

The spelling of 12222432420 in words is "twelve billion, two hundred twenty-two million, four hundred thirty-two thousand, four hundred twenty".