12212103420 has 144 divisors (see below), whose sum is σ = 41714749440. Its totient is φ = 2864995200.

The previous prime is 12212103419. The next prime is 12212103427. The reversal of 12212103420 is 2430121221.

It is a happy number.

12212103420 is a `hidden beast` number, since 1 + 221 + 21 + 0 + 3 + 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 = 12212103393 and 12212103402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212103427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38100 + ... + 160859.

It is an arithmetic number, because the mean of its divisors is an integer number (289685760).

Almost surely, 2^12212103420 is an apocalyptic number.

12212103420 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 12212103420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20857374720).

12212103420 is an abundant number, since it is smaller than the sum of its proper divisors (29502646020).

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

12212103420 is a wasteful number, since it uses less digits than its factorization.

12212103420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199016 (or 199011 counting only the distinct ones).

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

Adding to 12212103420 its reverse (2430121221), we get a palindrome (14642224641).

The spelling of 12212103420 in words is "twelve billion, two hundred twelve million, one hundred three thousand, four hundred twenty".