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2011121011 = 2044398377
BaseRepresentation
bin111011111011111…
…0100010101110011
312012011021112101101
41313313310111303
513104321333021
6531321145231
7100560150364
oct16767642563
95164245341
102011121011
11942252a89
1248162b217
1326086c243
14151151b6b
15bb85ca91
hex77df4573

2011121011 has 4 divisors (see below), whose sum is σ = 2011239832. Its totient is φ = 2011002192.

The previous prime is 2011121009. The next prime is 2011121033. The reversal of 2011121011 is 1101211102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2011121011 - 21 = 2011121009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011121071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28746 + ... + 69631.

It is an arithmetic number, because the mean of its divisors is an integer number (502809958).

Almost surely, 22011121011 is an apocalyptic number.

2011121011 is a deficient number, since it is larger than the sum of its proper divisors (118821).

2011121011 is an equidigital number, since it uses as much as digits as its factorization.

2011121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118820.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2011121011 is about 44845.5238680518. The cubic root of 2011121011 is about 1262.2520007728.

Adding to 2011121011 its reverse (1101211102), we get a palindrome (3112332113).

Subtracting from 2011121011 its reverse (1101211102), we obtain a palindrome (909909909).

The spelling of 2011121011 in words is "two billion, eleven million, one hundred twenty-one thousand, eleven".

Divisors: 1 20443 98377 2011121011