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1101001001 is a prime number
BaseRepresentation
bin100000110011111…
…1111000100101001
32211201201122102212
41001213333010221
54223324013001
6301130134505
736166232312
oct10147770451
92751648385
101101001001
11515539391
12268881435
131471414a9
14a631d609
15669d27bb
hex419ff129

1101001001 has 2 divisors, whose sum is σ = 1101001002. Its totient is φ = 1101001000.

The previous prime is 1101000983. The next prime is 1101001009. The reversal of 1101001001 is 1001001011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100646976 + 354025 = 33176^2 + 595^2 .

It is an emirp because it is prime and its reverse (1001001011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1101001001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101001009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550500500 + 550500501.

It is an arithmetic number, because the mean of its divisors is an integer number (550500501).

Almost surely, 21101001001 is an apocalyptic number.

It is an amenable number.

1101001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101001001 is an equidigital number, since it uses as much as digits as its factorization.

1101001001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1, while the sum is 5.

The square root of 1101001001 is about 33181.3351298588. The cubic root of 1101001001 is about 1032.5931458041.

Adding to 1101001001 its reverse (1001001011), we get a palindrome (2102002012).

The spelling of 1101001001 in words is "one billion, one hundred one million, one thousand, one".