12103221420 has 48 divisors (see below), whose sum is σ = 37654468320. Its totient is φ = 3227525568.

The previous prime is 12103221413. The next prime is 12103221467. The reversal of 12103221420 is 2412230121.

It is a happy number.

12103221420 is a `hidden beast` number, since 1 + 21 + 0 + 3 + 221 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12103221393 and 12103221402.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11206147 + ... + 11207226.

It is an arithmetic number, because the mean of its divisors is an integer number (784468090).

Almost surely, 2^12103221420 is an apocalyptic number.

12103221420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103221420 is an abundant number, since it is smaller than the sum of its proper divisors (25551246900).

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

12103221420 is a wasteful number, since it uses less digits than its factorization.

12103221420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22413391 (or 22413383 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12103221420 its reverse (2412230121), we get a palindrome (14515451541).

The spelling of 12103221420 in words is "twelve billion, one hundred three million, two hundred twenty-one thousand, four hundred twenty".