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131212011 = 376248191
BaseRepresentation
bin1111101001000…
…10001011101011
3100010220021001010
413310202023223
5232042241021
621004155003
73152166210
oct764421353
9303807033
10131212011
116807a587
1237b38a63
1321251358
14135d7b07
15b7bc976
hex7d222eb

131212011 has 8 divisors (see below), whose sum is σ = 199942144. Its totient is φ = 74978280.

The previous prime is 131211989. The next prime is 131212019. The reversal of 131212011 is 110212131.

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

It is not a de Polignac number, because 131212011 - 26 = 131211947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131212019) 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, 3124075 + ... + 3124116.

It is an arithmetic number, because the mean of its divisors is an integer number (24992768).

Almost surely, 2131212011 is an apocalyptic number.

131212011 is a deficient number, since it is larger than the sum of its proper divisors (68730133).

131212011 is an equidigital number, since it uses as much as digits as its factorization.

131212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6248201.

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

The square root of 131212011 is about 11454.7811415147. The cubic root of 131212011 is about 508.1491427159.

Adding to 131212011 its reverse (110212131), we get a palindrome (241424142).

It can be divided in two parts, 1312120 and 11, that added together give a palindrome (1312131).

The spelling of 131212011 in words is "one hundred thirty-one million, two hundred twelve thousand, eleven".

Divisors: 1 3 7 21 6248191 18744573 43737337 131212011