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11111111110001 = 71983542188797
BaseRepresentation
bin1010000110110000000111…
…0101001010110101110001
31110100012201102210220001202
42201230001311022311301
52424021023421010001
635344212440140545
72224515456061460
oct241540165126561
943305642726052
1011111111110001
1135a4217612451
1212b54a8767755
13627a08b917a6
142a5ad014a9d7
1514405b0ce96b
hexa1b01d4ad71

11111111110001 has 8 divisors (see below), whose sum is σ = 13366750207680. Its totient is φ = 9022556389968.

The previous prime is 11111111109979. The next prime is 11111111110031. The reversal of 11111111110001 is 10001111111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-11111111110001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111111110031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41771094266 + ... + 41771094531.

It is an arithmetic number, because the mean of its divisors is an integer number (1670843775960).

Almost surely, 211111111110001 is an apocalyptic number.

It is an amenable number.

11111111110001 is a deficient number, since it is larger than the sum of its proper divisors (2255639097679).

11111111110001 is an equidigital number, since it uses as much as digits as its factorization.

11111111110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83542188823.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 11111111110001 its reverse (10001111111111), we get a palindrome (21112222221112).

It can be divided in two parts, 111111111 and 10001, that multiplied together give a palindrome (1111222221111).

The spelling of 11111111110001 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred ten thousand, one".

Divisors: 1 7 19 133 83542188797 584795321579 1587301587143 11111111110001