2112021121220 has 36 divisors (see below), whose sum is σ = 4680964279404. Its totient is φ = 800344843200.

The previous prime is 2112021121169. The next prime is 2112021121291. The reversal of 2112021121220 is 221211202112.

It can be written as a sum of positive squares in 2 ways, for example, as 687569323204 + 1424451798016 = 829198^2 + 1193504^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146254631 + ... + 146269070.

It is an arithmetic number, because the mean of its divisors is an integer number (130026785539).

Almost surely, 2^{2112021121220} is an apocalyptic number.

2112021121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112021121220 is an abundant number, since it is smaller than the sum of its proper divisors (2568943158184).

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

2112021121220 is a wasteful number, since it uses less digits than its factorization.

2112021121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292523748 (or 292523727 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2112021121220 its reverse (221211202112), we get a palindrome (2333232323332).

The spelling of 2112021121220 in words is "two trillion, one hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty".