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101010111001001 = 175941771235353
BaseRepresentation
bin10110111101111000111111…
…110010001111000110101001
3111020122110202022101000122022
4112331320333302033012221
5101214422201404013001
6554455223203034225
730163511500034306
oct2675707762170651
9436573668330568
10101010111001001
112a204169371844
12b3b452996b975
13444929c0c4ac7
141ad2cb60340ad
15ba2788a1d11b
hex5bde3fc8f1a9

101010111001001 has 4 divisors (see below), whose sum is σ = 106951882236372. Its totient is φ = 95068339765632.

The previous prime is 101010111000991. The next prime is 101010111001031. The reversal of 101010111001001 is 100100111010101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27181374707776 + 73828736293225 = 5213576^2 + 8592365^2 .

It is a cyclic number.

It is not a de Polignac number, because 101010111001001 - 218 = 101010110738857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101010111001001.

It is not an unprimeable number, because it can be changed into a prime (101010111001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2970885617660 + ... + 2970885617693.

It is an arithmetic number, because the mean of its divisors is an integer number (26737970559093).

Almost surely, 2101010111001001 is an apocalyptic number.

It is an amenable number.

101010111001001 is a deficient number, since it is larger than the sum of its proper divisors (5941771235371).

101010111001001 is an equidigital number, since it uses as much as digits as its factorization.

101010111001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941771235370.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 101010111001001 its reverse (100100111010101), we get a palindrome (201110222011102).

The spelling of 101010111001001 in words is "one hundred one trillion, ten billion, one hundred eleven million, one thousand, one".

Divisors: 1 17 5941771235353 101010111001001