Search a number
212001109 is a prime number
BaseRepresentation
bin11001010001011…
…10000101010101
3112202220202211221
430220232011111
5413233013414
633011530341
75152660015
oct1450560525
9482822757
10212001109
11a973a631
125abb99b1
1334bc9958
1420227c45
151392a224
hexca2e155

212001109 has 2 divisors, whose sum is σ = 212001110. Its totient is φ = 212001108.

The previous prime is 212001079. The next prime is 212001149. The reversal of 212001109 is 901100212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210337009 + 1664100 = 14503^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001109 - 217 = 211870037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212001092 and 212001101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001149) 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, 106000554 + 106000555.

It is an arithmetic number, because the mean of its divisors is an integer number (106000555).

Almost surely, 2212001109 is an apocalyptic number.

It is an amenable number.

212001109 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001109 is an equidigital number, since it uses as much as digits as its factorization.

212001109 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 16.

The square root of 212001109 is about 14560.2578617276. The cubic root of 212001109 is about 596.2742355005.

The spelling of 212001109 in words is "two hundred twelve million, one thousand, one hundred nine".