2012221221020 has 12 divisors (see below), whose sum is σ = 4225664564184. Its totient is φ = 804888488400.

The previous prime is 2012221221019. The next prime is 2012221221091. The reversal of 2012221221020 is 201221222102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012221221020.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 50305530506 + ... + 50305530545.

It is an arithmetic number, because the mean of its divisors is an integer number (352138713682).

Almost surely, 2^{2012221221020} is an apocalyptic number.

2012221221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012221221020 is an abundant number, since it is smaller than the sum of its proper divisors (2213443343164).

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

2012221221020 is a wasteful number, since it uses less digits than its factorization.

2012221221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100611061060 (or 100611061058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2012221221020 its reverse (201221222102), we get a palindrome (2213442443122).

The spelling of 2012221221020 in words is "two trillion, twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty".