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120131213 is a prime number
BaseRepresentation
bin1110010100100…
…00111010001101
322101001022001012
413022100322031
5221223144323
615530455005
72656045526
oct712207215
9271038035
10120131213
11618a13a4
1234294465
131bb71877
1411d5184d
15a82e678
hex7290e8d

120131213 has 2 divisors, whose sum is σ = 120131214. Its totient is φ = 120131212.

The previous prime is 120131177. The next prime is 120131227. The reversal of 120131213 is 312131021.

It is an a-pointer prime, because the next prime (120131227) can be obtained adding 120131213 to its sum of digits (14).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113592964 + 6538249 = 10658^2 + 2557^2 .

It is an emirp because it is prime and its reverse (312131021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120131213 - 218 = 119869069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120131233) 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 as a sum of consecutive naturals, namely, 60065606 + 60065607.

It is an arithmetic number, because the mean of its divisors is an integer number (60065607).

Almost surely, 2120131213 is an apocalyptic number.

It is an amenable number.

120131213 is a deficient number, since it is larger than the sum of its proper divisors (1).

120131213 is an equidigital number, since it uses as much as digits as its factorization.

120131213 is an odious number, because the sum of its binary digits is odd.

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

The square root of 120131213 is about 10960.4385404965. The cubic root of 120131213 is about 493.4221266499.

Adding to 120131213 its reverse (312131021), we get a palindrome (432262234).

The spelling of 120131213 in words is "one hundred twenty million, one hundred thirty-one thousand, two hundred thirteen".