1212000019999 has 16 divisors (see below), whose sum is σ = 1229231404800. Its totient is φ = 1194874087680.

The previous prime is 1212000019963. The next prime is 1212000020029. The reversal of 1212000019999 is 9999100002121.

It is a cyclic number.

It is not a de Polignac number, because 1212000019999 - 2⁹ = 1212000019487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212000014999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27092352 + ... + 27137050.

It is an arithmetic number, because the mean of its divisors is an integer number (76826962800).

Almost surely, 2^{1212000019999} is an apocalyptic number.

1212000019999 is a deficient number, since it is larger than the sum of its proper divisors (17231384801).

1212000019999 is an equidigital number, since it uses as much as digits as its factorization.

1212000019999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45870.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 1212000019999 in words is "one trillion, two hundred twelve billion, nineteen thousand, nine hundred ninety-nine".