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12131330202 = 233224654263
BaseRepresentation
bin10110100110001010…
…10110100010011010
31011022110020102112000
423103011112202122
5144321110031302
65323440301430
7606424414425
oct132305264232
934273212460
1012131330202
115165901a32
122426911876
1311b44278c4
148312469bc
154b006331c
hex2d315689a

12131330202 has 16 divisors (see below), whose sum is σ = 26958511680. Its totient is φ = 4043776716.

The previous prime is 12131330201. The next prime is 12131330207. The reversal of 12131330202 is 20203313121.

12131330202 is a `hidden beast` number, since 1 + 2 + 131 + 330 + 202 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12131330201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112327078 + ... + 112327185.

It is an arithmetic number, because the mean of its divisors is an integer number (1684906980).

Almost surely, 212131330202 is an apocalyptic number.

12131330202 is an abundant number, since it is smaller than the sum of its proper divisors (14827181478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131330202 is a wasteful number, since it uses less digits than its factorization.

12131330202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224654274 (or 224654268 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12131330202 its reverse (20203313121), we get a palindrome (32334643323).

The spelling of 12131330202 in words is "twelve billion, one hundred thirty-one million, three hundred thirty thousand, two hundred two".

Divisors: 1 2 3 6 9 18 27 54 224654263 449308526 673962789 1347925578 2021888367 4043776734 6065665101 12131330202