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12132431131 = 65386321529
BaseRepresentation
bin10110100110010011…
…00011010100011011
31011022112022100201011
423103021203110123
5144321400244011
65323520034351
7606436651222
oct132311432433
934275270634
1012132431131
115166494097
1224271629b7
1311b4721a42
14831451cb9
154b01ce621
hex2d326351b

12132431131 has 8 divisors (see below), whose sum is σ = 12165655680. Its totient is φ = 12099252672.

The previous prime is 12132431117. The next prime is 12132431147. The reversal of 12132431131 is 13113423121.

12132431131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12132431131 - 25 = 12132431099 is a prime.

It is a super-2 number, since 2×121324311312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12132431431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552775 + ... + 574303.

It is an arithmetic number, because the mean of its divisors is an integer number (1520706960).

Almost surely, 212132431131 is an apocalyptic number.

12132431131 is a deficient number, since it is larger than the sum of its proper divisors (33224549).

12132431131 is an equidigital number, since it uses as much as digits as its factorization.

12132431131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23045.

The product of its digits is 432, while the sum is 22.

Adding to 12132431131 its reverse (13113423121), we get a palindrome (25245854252).

The spelling of 12132431131 in words is "twelve billion, one hundred thirty-two million, four hundred thirty-one thousand, one hundred thirty-one".

Divisors: 1 653 863 21529 563539 14058437 18579527 12132431131