12420111220 has 48 divisors (see below), whose sum is σ = 28461182400. Its totient is φ = 4515160320.

The previous prime is 12420111167. The next prime is 12420111227. The reversal of 12420111220 is 2211102421.

It is a junction number, because it is equal to n+sod(n) for n = 12420111194 and 12420111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420111227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266496 + ... + 1276264.

It is an arithmetic number, because the mean of its divisors is an integer number (592941300).

Almost surely, 2^12420111220 is an apocalyptic number.

12420111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420111220 is an abundant number, since it is smaller than the sum of its proper divisors (16041071180).

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

12420111220 is a wasteful number, since it uses less digits than its factorization.

12420111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15568 (or 15566 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12420111220 its reverse (2211102421), we get a palindrome (14631213641).

The spelling of 12420111220 in words is "twelve billion, four hundred twenty million, one hundred eleven thousand, two hundred twenty".