2011221073 has 2 divisors, whose sum is σ = 2011221074. Its totient is φ = 2011221072.

The previous prime is 2011221061. The next prime is 2011221119. The reversal of 2011221073 is 3701221102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1275346944 + 735874129 = 35712^2 + 27127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011221073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011221073.

It is not a weakly prime, because it can be changed into another prime (2011221973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005610536 + 1005610537.

It is an arithmetic number, because the mean of its divisors is an integer number (1005610537).

Almost surely, 2^2011221073 is an apocalyptic number.

It is an amenable number.

2011221073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011221073 is an equidigital number, since it uses as much as digits as its factorization.

2011221073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 2011221073 is about 44846.6394839123. The cubic root of 2011221073 is about 1262.2729345977.

Adding to 2011221073 its reverse (3701221102), we get a palindrome (5712442175).

The spelling of 2011221073 in words is "two billion, eleven million, two hundred twenty-one thousand, seventy-three".