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131201443211 = 161981038569
BaseRepresentation
bin111101000110000110…
…1110010010110001011
3110112122122122212212112
41322030031302112023
54122200032140321
6140134554132535
712323202603146
oct1721415622613
9415578585775
10131201443211
1150707881203
122151712114b
13c4aba82b87
1464c8c9305d
15362d586a5b
hex1e8c37258b

131201443211 has 4 divisors (see below), whose sum is σ = 131282483400. Its totient is φ = 131120403024.

The previous prime is 131201443193. The next prime is 131201443231. The reversal of 131201443211 is 112344102131.

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 131201443211 - 230 = 130127701387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131201443231) 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, 40517666 + ... + 40520903.

It is an arithmetic number, because the mean of its divisors is an integer number (32820620850).

Almost surely, 2131201443211 is an apocalyptic number.

131201443211 is a deficient number, since it is larger than the sum of its proper divisors (81040189).

131201443211 is an equidigital number, since it uses as much as digits as its factorization.

131201443211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81040188.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 131201443211 its reverse (112344102131), we get a palindrome (243545545342).

The spelling of 131201443211 in words is "one hundred thirty-one billion, two hundred one million, four hundred forty-three thousand, two hundred eleven".

Divisors: 1 1619 81038569 131201443211