12212420320 has 96 divisors (see below), whose sum is σ = 29371398336. Its totient is φ = 4797542400.

The previous prime is 12212420291. The next prime is 12212420323. The reversal of 12212420320 is 2302421221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212420323) 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, 3144780 + ... + 3148660.

It is an arithmetic number, because the mean of its divisors is an integer number (305952066).

Almost surely, 2^12212420320 is an apocalyptic number.

12212420320 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 12212420320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14685699168).

12212420320 is an abundant number, since it is smaller than the sum of its proper divisors (17158978016).

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

12212420320 is a wasteful number, since it uses less digits than its factorization.

12212420320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244 (or 4236 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12212420320 its reverse (2302421221), we get a palindrome (14514841541).

Subtracting from 12212420320 its reverse (2302421221), we obtain a palindrome (9909999099).

The spelling of 12212420320 in words is "twelve billion, two hundred twelve million, four hundred twenty thousand, three hundred twenty".