1201111099999 has 2 divisors, whose sum is σ = 1201111100000. Its totient is φ = 1201111099998.

The previous prime is 1201111099987. The next prime is 1201111100017. The reversal of 1201111099999 is 9999901111021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201111099999 - 2²⁵ = 1201077545567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201111069999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600555549999 + 600555550000.

It is an arithmetic number, because the mean of its divisors is an integer number (600555550000).

Almost surely, 2^{1201111099999} is an apocalyptic number.

1201111099999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201111099999 is an equidigital number, since it uses as much as digits as its factorization.

1201111099999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 52.

The spelling of 1201111099999 in words is "one trillion, two hundred one billion, one hundred eleven million, ninety-nine thousand, nine hundred ninety-nine".