1201112102009 has 2 divisors, whose sum is σ = 1201112102010. Its totient is φ = 1201112102008.

The previous prime is 1201112101997. The next prime is 1201112102017. The reversal of 1201112102009 is 9002012111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 906024133609 + 295087968400 = 951853^2 + 543220^2 .

It is an emirp because it is prime and its reverse (9002012111021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201112102009 - 2⁴ = 1201112101993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201112102059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600556051004 + 600556051005.

It is an arithmetic number, because the mean of its divisors is an integer number (600556051005).

Almost surely, 2^{1201112102009} is an apocalyptic number.

It is an amenable number.

1201112102009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201112102009 is an equidigital number, since it uses as much as digits as its factorization.

1201112102009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1201112102009 in words is "one trillion, two hundred one billion, one hundred twelve million, one hundred two thousand, nine".