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2011221211 = 6593051929
BaseRepresentation
bin111011111100000…
…1100110011011011
312012011110121211111
41313320030303123
513104333034321
6531323241151
7100561045456
oct16770146333
95164417744
102011221211
1194231129a
124816791b7
132608a5a2c
1415117a49d
15bb87c5e1
hex77e0ccdb

2011221211 has 4 divisors (see below), whose sum is σ = 2014273800. Its totient is φ = 2008168624.

The previous prime is 2011221203. The next prime is 2011221217. The reversal of 2011221211 is 1121221102.

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

It is a cyclic number.

It is not a de Polignac number, because 2011221211 - 23 = 2011221203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011221191 and 2011221200.

It is not an unprimeable number, because it can be changed into a prime (2011221217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525306 + ... + 1526623.

It is an arithmetic number, because the mean of its divisors is an integer number (503568450).

Almost surely, 22011221211 is an apocalyptic number.

2011221211 is a deficient number, since it is larger than the sum of its proper divisors (3052589).

2011221211 is an equidigital number, since it uses as much as digits as its factorization.

2011221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052588.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2011221211 is about 44846.6410224891. The cubic root of 2011221211 is about 1262.2729634680.

Adding to 2011221211 its reverse (1121221102), we get a palindrome (3132442313).

The spelling of 2011221211 in words is "two billion, eleven million, two hundred twenty-one thousand, two hundred eleven".

Divisors: 1 659 3051929 2011221211