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120000121 is a prime number
BaseRepresentation
bin1110010011100…
…00111001111001
322100210122012221
413021300321321
5221210000441
615524004041
72654661403
oct711607171
9270718187
10120000121
116181195a
1234230621
131bb26cb7
1411d19b73
15a8058d1
hex7270e79

120000121 has 2 divisors, whose sum is σ = 120000122. Its totient is φ = 120000120.

The previous prime is 120000107. The next prime is 120000137. The reversal of 120000121 is 121000021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109830400 + 10169721 = 10480^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000121 - 213 = 119991929 is a prime.

It is not a weakly prime, because it can be changed into another prime (120001121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60000060 + 60000061.

It is an arithmetic number, because the mean of its divisors is an integer number (60000061).

Almost surely, 2120000121 is an apocalyptic number.

It is an amenable number.

120000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120000121 is an equidigital number, since it uses as much as digits as its factorization.

120000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 120000121 is about 10954.4566729711. The cubic root of 120000121 is about 493.2425806503.

Adding to 120000121 its reverse (121000021), we get a palindrome (241000142).

The spelling of 120000121 in words is "one hundred twenty million, one hundred twenty-one", and thus it is an aban number.