2220102001721 has 2 divisors, whose sum is σ = 2220102001722. Its totient is φ = 2220102001720.

The previous prime is 2220102001709. The next prime is 2220102001727. The reversal of 2220102001721 is 1271002010222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1956305742400 + 263796259321 = 1398680^2 + 513611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220102001721 - 2³⁸ = 1945224094777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220102001693 and 2220102001702.

It is not a weakly prime, because it can be changed into another prime (2220102001727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110051000860 + 1110051000861.

It is an arithmetic number, because the mean of its divisors is an integer number (1110051000861).

Almost surely, 2^{2220102001721} is an apocalyptic number.

It is an amenable number.

2220102001721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220102001721 is an equidigital number, since it uses as much as digits as its factorization.

2220102001721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 2220102001721 its reverse (1271002010222), we get a palindrome (3491104011943).

The spelling of 2220102001721 in words is "two trillion, two hundred twenty billion, one hundred two million, one thousand, seven hundred twenty-one".