2021001122220 has 24 divisors (see below), whose sum is σ = 5658803142384. Its totient is φ = 538933632576.

The previous prime is 2021001122183. The next prime is 2021001122237. The reversal of 2021001122220 is 222211001202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2021001122220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16841675959 + ... + 16841676078.

It is an arithmetic number, because the mean of its divisors is an integer number (235783464266).

Almost surely, 2^{2021001122220} is an apocalyptic number.

2021001122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021001122220 is an abundant number, since it is smaller than the sum of its proper divisors (3637802020164).

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

2021001122220 is a wasteful number, since it uses less digits than its factorization.

2021001122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33683352049 (or 33683352047 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021001122220 its reverse (222211001202), we get a palindrome (2243212123422).

The spelling of 2021001122220 in words is "two trillion, twenty-one billion, one million, one hundred twenty-two thousand, two hundred twenty".