1210000200109 has 2 divisors, whose sum is σ = 1210000200110. Its totient is φ = 1210000200108.

The previous prime is 1210000200061. The next prime is 1210000200131. The reversal of 1210000200109 is 9010020000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193763834025 + 16236366084 = 1092595^2 + 127422^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210000200109 - 2¹⁷ = 1210000069037 is a prime.

It is a super-2 number, since 2×1210000200109² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210000200092 and 1210000200101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210000200169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605000100054 + 605000100055.

It is an arithmetic number, because the mean of its divisors is an integer number (605000100055).

Almost surely, 2^{1210000200109} is an apocalyptic number.

It is an amenable number.

1210000200109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210000200109 is an equidigital number, since it uses as much as digits as its factorization.

1210000200109 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 spelling of 1210000200109 in words is "one trillion, two hundred ten billion, two hundred thousand, one hundred nine".