1200220111999 has 4 divisors (see below), whose sum is σ = 1200298949064. Its totient is φ = 1200141274936.

The previous prime is 1200220111957. The next prime is 1200220112027. The reversal of 1200220111999 is 9991110220021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200220111999 - 2⁹ = 1200220111487 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 (1200220111939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39395692 + ... + 39426145.

It is an arithmetic number, because the mean of its divisors is an integer number (300074737266).

Almost surely, 2^{1200220111999} is an apocalyptic number.

1200220111999 is a deficient number, since it is larger than the sum of its proper divisors (78837065).

1200220111999 is an equidigital number, since it uses as much as digits as its factorization.

1200220111999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78837064.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 1200220111999 in words is "one trillion, two hundred billion, two hundred twenty million, one hundred eleven thousand, nine hundred ninety-nine".