2010721220665 has 8 divisors (see below), whose sum is σ = 2412873105408. Its totient is φ = 1608571882800.

The previous prime is 2010721220593. The next prime is 2010721220689. The reversal of 2010721220665 is 5660221270102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2010721220665 - 2²³ = 2010712832057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2010721220665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550990 + ... + 3244840.

It is an arithmetic number, because the mean of its divisors is an integer number (301609138176).

Almost surely, 2^{2010721220665} is an apocalyptic number.

It is an amenable number.

2010721220665 is a deficient number, since it is larger than the sum of its proper divisors (402151884743).

2010721220665 is an equidigital number, since it uses as much as digits as its factorization.

2010721220665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273439.

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 2010721220665 its reverse (5660221270102), we get a palindrome (7670942490767).

The spelling of 2010721220665 in words is "two trillion, ten billion, seven hundred twenty-one million, two hundred twenty thousand, six hundred sixty-five".