1200102109 has 2 divisors, whose sum is σ = 1200102110. Its totient is φ = 1200102108.

The previous prime is 1200102107. The next prime is 1200102203. The reversal of 1200102109 is 9012010021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 777182884 + 422919225 = 27878^2 + 20565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200102109 - 2¹ = 1200102107 is a prime.

Together with 1200102107, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1200102092 and 1200102101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200102107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600051054 + 600051055.

It is an arithmetic number, because the mean of its divisors is an integer number (600051055).

Almost surely, 2^1200102109 is an apocalyptic number.

It is an amenable number.

1200102109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200102109 is an equidigital number, since it uses as much as digits as its factorization.

1200102109 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 1200102109 is about 34642.4899364927. The cubic root of 1200102109 is about 1062.6887091621.

The spelling of 1200102109 in words is "one billion, two hundred million, one hundred two thousand, one hundred nine".