2211112121999 has 4 divisors (see below), whose sum is σ = 2412122314920. Its totient is φ = 2010101929080.

The previous prime is 2211112121989. The next prime is 2211112122007. The reversal of 2211112121999 is 9991212111122.

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 2211112121999 - 2⁴⁰ = 1111600494223 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 (2211112121969) 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 3 ways as a sum of consecutive naturals, for example, 100505096444 + ... + 100505096465.

It is an arithmetic number, because the mean of its divisors is an integer number (603030578730).

Almost surely, 2^{2211112121999} is an apocalyptic number.

2211112121999 is a deficient number, since it is larger than the sum of its proper divisors (201010192921).

2211112121999 is a wasteful number, since it uses less digits than its factorization.

2211112121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201010192920.

The product of its digits is 11664, while the sum is 41.

The spelling of 2211112121999 in words is "two trillion, two hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, nine hundred ninety-nine".