2011133221 has 2 divisors, whose sum is σ = 2011133222. Its totient is φ = 2011133220.

The previous prime is 2011133183. The next prime is 2011133227. The reversal of 2011133221 is 1223311102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1168682596 + 842450625 = 34186^2 + 29025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011133221 - 2¹⁹ = 2010608933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011133195 and 2011133204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011133227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005566610 + 1005566611.

It is an arithmetic number, because the mean of its divisors is an integer number (1005566611).

Almost surely, 2^2011133221 is an apocalyptic number.

It is an amenable number.

2011133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011133221 is an equidigital number, since it uses as much as digits as its factorization.

2011133221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2011133221 is about 44845.6600018330. The cubic root of 2011133221 is about 1262.2545552463.

Adding to 2011133221 its reverse (1223311102), we get a palindrome (3234444323).

The spelling of 2011133221 in words is "two billion, eleven million, one hundred thirty-three thousand, two hundred twenty-one".