2011356221 has 12 divisors (see below), whose sum is σ = 2307254112. Its totient is φ = 1717622256.

The previous prime is 2011356199. The next prime is 2011356227. The reversal of 2011356221 is 1226531102.

It is not a de Polignac number, because 2011356221 - 2⁶ = 2011356157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011356227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 599270 + ... + 602616.

It is an arithmetic number, because the mean of its divisors is an integer number (192271176).

Almost surely, 2^2011356221 is an apocalyptic number.

It is an amenable number.

2011356221 is a deficient number, since it is larger than the sum of its proper divisors (295897891).

2011356221 is an frugal number, since it uses more digits than its factorization.

2011356221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940 (or 3647 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2011356221 is about 44848.1462381669. The cubic root of 2011356221 is about 1262.3012076111.

Adding to 2011356221 its reverse (1226531102), we get a palindrome (3237887323).

The spelling of 2011356221 in words is "two billion, eleven million, three hundred fifty-six thousand, two hundred twenty-one".