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11212030001 = 91811221221
BaseRepresentation
bin10100111000100101…
…00000000000110001
31001221101102010201102
422130102200000301
5140430234430001
65052320414145
7544562453054
oct123422400061
931841363642
1011212030001
1148339980a7
12220aa77355
131098b344a3
14785104a9b
154594c2e6b
hex29c4a0031

11212030001 has 4 divisors (see below), whose sum is σ = 11213260404. Its totient is φ = 11210799600.

The previous prime is 11212029991. The next prime is 11212030003. The reversal of 11212030001 is 10003021211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10003021211 = 81911221221.

It can be written as a sum of positive squares in 2 ways, for example, as 10027018225 + 1185011776 = 100135^2 + 34424^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212030001 - 210 = 11212028977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212030003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601430 + ... + 619791.

It is an arithmetic number, because the mean of its divisors is an integer number (2803315101).

Almost surely, 211212030001 is an apocalyptic number.

It is an amenable number.

11212030001 is a deficient number, since it is larger than the sum of its proper divisors (1230403).

11212030001 is an equidigital number, since it uses as much as digits as its factorization.

11212030001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230402.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11212030001 its reverse (10003021211), we get a palindrome (21215051212).

The spelling of 11212030001 in words is "eleven billion, two hundred twelve million, thirty thousand, one".

Divisors: 1 9181 1221221 11212030001