1200102212009 has 2 divisors, whose sum is σ = 1200102212010. Its totient is φ = 1200102212008.

The previous prime is 1200102211991. The next prime is 1200102212021. The reversal of 1200102212009 is 9002122010021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1186798896409 + 13303315600 = 1089403^2 + 115340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200102212009 - 2⁸ = 1200102211753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200102218009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600051106004 + 600051106005.

It is an arithmetic number, because the mean of its divisors is an integer number (600051106005).

Almost surely, 2^{1200102212009} is an apocalyptic number.

It is an amenable number.

1200102212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200102212009 is an equidigital number, since it uses as much as digits as its factorization.

1200102212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 1200102212009 in words is "one trillion, two hundred billion, one hundred two million, two hundred twelve thousand, nine".