2011221011 has 8 divisors (see below), whose sum is σ = 2060916144. Its totient is φ = 1961556480.

The previous prime is 2011220999. The next prime is 2011221049. The reversal of 2011221011 is 1101221102.

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

It is a cyclic number.

It is not a de Polignac number, because 2011221011 - 2¹⁴ = 2011204627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011220983 and 2011221001.

It is not an unprimeable number, because it can be changed into a prime (2011221061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183395 + ... + 194051.

It is an arithmetic number, because the mean of its divisors is an integer number (257614518).

Almost surely, 2^2011221011 is an apocalyptic number.

2011221011 is a deficient number, since it is larger than the sum of its proper divisors (49695133).

2011221011 is a wasteful number, since it uses less digits than its factorization.

2011221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15301.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2011221011 is about 44846.6387926676. The cubic root of 2011221011 is about 1262.2729216269.

Adding to 2011221011 its reverse (1101221102), we get a palindrome (3112442113).

Subtracting from 2011221011 its reverse (1101221102), we obtain a palindrome (909999909).

The spelling of 2011221011 in words is "two billion, eleven million, two hundred twenty-one thousand, eleven".