2010721720529 has 2 divisors, whose sum is σ = 2010721720530. Its totient is φ = 2010721720528.

The previous prime is 2010721720507. The next prime is 2010721720603. The reversal of 2010721720529 is 9250271270102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1508295928129 + 502425792400 = 1228127^2 + 708820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2010721720529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2010721720492 and 2010721720501.

It is not a weakly prime, because it can be changed into another prime (2010721750529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005360860264 + 1005360860265.

It is an arithmetic number, because the mean of its divisors is an integer number (1005360860265).

Almost surely, 2^{2010721720529} is an apocalyptic number.

It is an amenable number.

2010721720529 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010721720529 is an equidigital number, since it uses as much as digits as its factorization.

2010721720529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 2010721720529 in words is "two trillion, ten billion, seven hundred twenty-one million, seven hundred twenty thousand, five hundred twenty-nine".