2000220101221 has 4 divisors (see below), whose sum is σ = 2001060179244. Its totient is φ = 1999380023200.

The previous prime is 2000220101203. The next prime is 2000220101227. The reversal of 2000220101221 is 1221010220002.

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 97103284996 + 1903116816225 = 311614^2 + 1379535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000220101221 - 2²¹ = 2000218004069 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 (2000220101227) 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, 420035440 + ... + 420040201.

It is an arithmetic number, because the mean of its divisors is an integer number (500265044811).

Almost surely, 2^{2000220101221} is an apocalyptic number.

It is an amenable number.

2000220101221 is a deficient number, since it is larger than the sum of its proper divisors (840078023).

2000220101221 is an equidigital number, since it uses as much as digits as its factorization.

2000220101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840078022.

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

Adding to 2000220101221 its reverse (1221010220002), we get a palindrome (3221230321223).

The spelling of 2000220101221 in words is "two trillion, two hundred twenty million, one hundred one thousand, two hundred twenty-one".