2011722205 has 4 divisors (see below), whose sum is σ = 2414066652. Its totient is φ = 1609377760.

The previous prime is 2011722173. The next prime is 2011722221. The reversal of 2011722205 is 5022271102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1393006329 + 618715876 = 37323^2 + 24874^2 .

It is not a de Polignac number, because 2011722205 - 2⁵ = 2011722173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201172216 + ... + 201172225.

It is an arithmetic number, because the mean of its divisors is an integer number (603516663).

Almost surely, 2^2011722205 is an apocalyptic number.

It is an amenable number.

2011722205 is a deficient number, since it is larger than the sum of its proper divisors (402344447).

2011722205 is an equidigital number, since it uses as much as digits as its factorization.

2011722205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402344446.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 2011722205 is about 44852.2263104074. The cubic root of 2011722205 is about 1262.3777652463.

Adding to 2011722205 its reverse (5022271102), we get a palindrome (7033993307).

The spelling of 2011722205 in words is "two billion, eleven million, seven hundred twenty-two thousand, two hundred five".