2221001121020 has 24 divisors (see below), whose sum is σ = 5088111659568. Its totient is φ = 807636771200.

The previous prime is 2221001121007. The next prime is 2221001121041. The reversal of 2221001121020 is 201211001222.

It is a junction number, because it is equal to n+sod(n) for n = 2221001120986 and 2221001121004.

It is a congruent number.

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, 5047729601 + ... + 5047730040.

It is an arithmetic number, because the mean of its divisors is an integer number (212004652482).

Almost surely, 2^{2221001121020} is an apocalyptic number.

2221001121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221001121020 is an abundant number, since it is smaller than the sum of its proper divisors (2867110538548).

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

2221001121020 is a wasteful number, since it uses less digits than its factorization.

2221001121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10095459661 (or 10095459659 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2221001121020 its reverse (201211001222), we get a palindrome (2422212122242).

The spelling of 2221001121020 in words is "two trillion, two hundred twenty-one billion, one million, one hundred twenty-one thousand, twenty".