2000020211221 has 4 divisors (see below), whose sum is σ = 2001198775212. Its totient is φ = 1998841647232.

The previous prime is 2000020211219. The next prime is 2000020211237. The reversal of 2000020211221 is 1221120200002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1614459936996 + 385560274225 = 1270614^2 + 620935^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000020211221 - 2¹ = 2000020211219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000020211261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589279450 + ... + 589282843.

It is an arithmetic number, because the mean of its divisors is an integer number (500299693803).

Almost surely, 2^{2000020211221} is an apocalyptic number.

It is an amenable number.

2000020211221 is a deficient number, since it is larger than the sum of its proper divisors (1178563991).

2000020211221 is a wasteful number, since it uses less digits than its factorization.

2000020211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178563990.

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

Adding to 2000020211221 its reverse (1221120200002), we get a palindrome (3221140411223).

The spelling of 2000020211221 in words is "two trillion, twenty million, two hundred eleven thousand, two hundred twenty-one".