2000720221 has 2 divisors, whose sum is σ = 2000720222. Its totient is φ = 2000720220.

The previous prime is 2000720143. The next prime is 2000720231. The reversal of 2000720221 is 1220270002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1318779225 + 681940996 = 36315^2 + 26114^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000720221 - 2⁹ = 2000719709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2000720195 and 2000720204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000720231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000360110 + 1000360111.

It is an arithmetic number, because the mean of its divisors is an integer number (1000360111).

Almost surely, 2^2000720221 is an apocalyptic number.

It is an amenable number.

2000720221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000720221 is an equidigital number, since it uses as much as digits as its factorization.

2000720221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2000720221 is about 44729.4111407696. The cubic root of 2000720221 is about 1260.0722686776.

Adding to 2000720221 its reverse (1220270002), we get a palindrome (3220990223).

The spelling of 2000720221 in words is "two billion, seven hundred twenty thousand, two hundred twenty-one".