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1200213131013 = 321321647473887
BaseRepresentation
bin10001011101110010010…
…001101111111100000101
311020201221220202021202200
4101131302101233330011
5124131014030143023
62315211552425113
7152466254200161
oct21356221577405
94221856667680
101200213131013
1142300a028626
12174738b48199
13892447bba30
144213a967ca1
152134878a743
hex1177246ff05

1200213131013 has 24 divisors (see below), whose sum is σ = 1867088391168. Its totient is φ = 738557017632.

The previous prime is 1200213131011. The next prime is 1200213131023. The reversal of 1200213131013 is 3101313120021.

It is not a de Polignac number, because 1200213131013 - 21 = 1200213131011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200213131011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2295756 + ... + 2769642.

It is an arithmetic number, because the mean of its divisors is an integer number (77795349632).

Almost surely, 21200213131013 is an apocalyptic number.

1200213131013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1200213131013 is a deficient number, since it is larger than the sum of its proper divisors (666875260155).

1200213131013 is a wasteful number, since it uses less digits than its factorization.

1200213131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495553 (or 495550 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1200213131013 its reverse (3101313120021), we get a palindrome (4301526251034).

The spelling of 1200213131013 in words is "one trillion, two hundred billion, two hundred thirteen million, one hundred thirty-one thousand, thirteen".

Divisors: 1 3 9 13 39 117 21647 64941 194823 281411 473887 844233 1421661 2532699 4264983 6160531 18481593 55444779 10258231889 30774695667 92324087001 133357014557 400071043671 1200213131013