12021020220 has 48 divisors (see below), whose sum is σ = 36718754688. Its totient is φ = 2914186560.

The previous prime is 12021020197. The next prime is 12021020239. The reversal of 12021020220 is 2202012021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12021020196 and 12021020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9106174 + ... + 9107493.

It is an arithmetic number, because the mean of its divisors is an integer number (764974056).

Almost surely, 2^12021020220 is an apocalyptic number.

12021020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021020220 is an abundant number, since it is smaller than the sum of its proper divisors (24697734468).

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

12021020220 is a wasteful number, since it uses less digits than its factorization.

12021020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18213690 (or 18213688 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12021020220 its reverse (2202012021), we get a palindrome (14223032241).

The spelling of 12021020220 in words is "twelve billion, twenty-one million, twenty thousand, two hundred twenty".