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1001111111101 = 197313737913901
BaseRepresentation
bin11101001000101101101…
…11110100010110111101
310112201001011011201101001
432210112313310112331
5112400233421023401
62043523141250301
7132220316020003
oct16442667642675
93481034151331
101001111111101
1135662913a132
12142032103991
1373534539a2a
143664dc38a73
151b094094601
hexe916df45bd

1001111111101 has 32 divisors (see below), whose sum is σ = 1078950902400. Its totient is φ = 926084275200.

The previous prime is 1001111111089. The next prime is 1001111111107. The reversal of 1001111111101 is 1011111111001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1001111111101 - 25 = 1001111111069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001111111107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72010251 + ... + 72024151.

It is an arithmetic number, because the mean of its divisors is an integer number (33717215700).

Almost surely, 21001111111101 is an apocalyptic number.

It is an amenable number.

1001111111101 is a deficient number, since it is larger than the sum of its proper divisors (77839791299).

1001111111101 is a wasteful number, since it uses less digits than its factorization.

1001111111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14509.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 1001111111101 its reverse (1011111111001), we get a palindrome (2012222222102).

The spelling of 1001111111101 in words is "one trillion, one billion, one hundred eleven million, one hundred eleven thousand, one hundred one".

Divisors: 1 19 73 137 379 1387 2603 7201 10001 13901 27667 51923 190019 264119 525673 986537 1014773 1904437 3790379 5268479 19280687 36184303 72017201 100101101 139023901 384598967 721781623 2641454119 7307380373 13713850837 52690058479 1001111111101