12221012020 has 96 divisors (see below), whose sum is σ = 31084155648. Its totient is φ = 3939981312.

The previous prime is 12221012017. The next prime is 12221012039. The reversal of 12221012020 is 2021012221.

It is a happy number.

12221012020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4123059 + ... + 4126021.

It is an arithmetic number, because the mean of its divisors is an integer number (323793288).

Almost surely, 2^12221012020 is an apocalyptic number.

12221012020 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 12221012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15542077824).

12221012020 is an abundant number, since it is smaller than the sum of its proper divisors (18863143628).

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

12221012020 is a wasteful number, since it uses less digits than its factorization.

12221012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729 (or 4727 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12221012020 its reverse (2021012221), we get a palindrome (14242024241).

The spelling of 12221012020 in words is "twelve billion, two hundred twenty-one million, twelve thousand, twenty".