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1212300131 = 72241251409
BaseRepresentation
bin100100001000010…
…0011101101100011
310010111011020010212
41020100203231203
54440322101011
6320143444335
742020244500
oct11020435543
93114136125
101212300131
11572348039
12299bb66ab
1316420cc73
14b70124a7
157166a08b
hex48423b63

1212300131 has 24 divisors (see below), whose sum is σ = 1425196080. Its totient is φ = 1028160000.

The previous prime is 1212300121. The next prime is 1212300139. The reversal of 1212300131 is 1310032121.

It is not a de Polignac number, because 1212300131 - 210 = 1212299107 is a prime.

It is a super-2 number, since 2×12123001312 = 2939343215245234322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212300139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2963855 + ... + 2964263.

It is an arithmetic number, because the mean of its divisors is an integer number (59383170).

Almost surely, 21212300131 is an apocalyptic number.

1212300131 is a deficient number, since it is larger than the sum of its proper divisors (212895949).

1212300131 is a wasteful number, since it uses less digits than its factorization.

1212300131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1212300131 is about 34818.1006230955. The cubic root of 1212300131 is about 1066.2770227989.

Adding to 1212300131 its reverse (1310032121), we get a palindrome (2522332252).

The spelling of 1212300131 in words is "one billion, two hundred twelve million, three hundred thousand, one hundred thirty-one".

Divisors: 1 7 49 241 251 409 1687 1757 2863 11809 12299 20041 60491 98569 102659 423437 689983 718613 2964059 4829881 5030291 24740819 173185733 1212300131