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11010101111001 = 321223344567889
BaseRepresentation
bin1010000000110111110100…
…1010100110100011011001
31102222112222212200021122200
42200031331022212203121
52420342141341023001
635225545353240413
72214311366205456
oct240157512464331
942875885607580
1011010101111001
1135653a3054133
1212999b8703109
1361b32c053905
142a0c6acd882d
151415e838b086
hexa037d2a68d9

11010101111001 has 6 divisors (see below), whose sum is σ = 15903479382570. Its totient is φ = 7340067407328.

The previous prime is 11010101110999. The next prime is 11010101111047. The reversal of 11010101111001 is 10011110101011.

It can be written as a sum of positive squares in only one way, i.e., 10116979718400 + 893121392601 = 3180720^2 + 945051^2 .

It is not a de Polignac number, because 11010101111001 - 21 = 11010101110999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1223344567889 = 11010101111001 / (1 + 1 + 0 + 1 + 0 + 1 + 0 + 1 + 1 + 1 + 1 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (11010101111071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611672283936 + ... + 611672283953.

It is an arithmetic number, because the mean of its divisors is an integer number (2650579897095).

Almost surely, 211010101111001 is an apocalyptic number.

It is an amenable number.

11010101111001 is a deficient number, since it is larger than the sum of its proper divisors (4893378271569).

11010101111001 is a wasteful number, since it uses less digits than its factorization.

11010101111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223344567895 (or 1223344567892 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 11010101111001 its reverse (10011110101011), we get a palindrome (21021211212012).

The spelling of 11010101111001 in words is "eleven trillion, ten billion, one hundred one million, one hundred eleven thousand, one".

Divisors: 1 3 9 1223344567889 3670033703667 11010101111001