1220111999999 has 4 divisors (see below), whose sum is σ = 1220124380664. Its totient is φ = 1220099619336.

The previous prime is 1220111999971. The next prime is 1220112000001. The reversal of 1220111999999 is 9999991110221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220111999999 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 (1220111993999) 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 in 3 ways as a sum of consecutive naturals, for example, 6041312 + ... + 6240005.

It is an arithmetic number, because the mean of its divisors is an integer number (305031095166).

Almost surely, 2^{1220111999999} is an apocalyptic number.

1220111999999 is a deficient number, since it is larger than the sum of its proper divisors (12380665).

1220111999999 is an equidigital number, since it uses as much as digits as its factorization.

1220111999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380664.

The product of its (nonzero) digits is 2125764, while the sum is 62.

The spelling of 1220111999999 in words is "one trillion, two hundred twenty billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".