2011121219 has 4 divisors (see below), whose sum is σ = 2098561296. Its totient is φ = 1923681144.

The previous prime is 2011121201. The next prime is 2011121269. The reversal of 2011121219 is 9121211102.

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-2011121219 is a prime.

It is a super-2 number, since 2×2011121219² = 8089217115024091922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011121219.

It is not an unprimeable number, because it can be changed into a prime (2011121269) 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, 43720004 + ... + 43720049.

It is an arithmetic number, because the mean of its divisors is an integer number (524640324).

Almost surely, 2^2011121219 is an apocalyptic number.

2011121219 is a deficient number, since it is larger than the sum of its proper divisors (87440077).

2011121219 is an equidigital number, since it uses as much as digits as its factorization.

2011121219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87440076.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 2011121219 is about 44845.5261871237. The cubic root of 2011121219 is about 1262.2520442889.

The spelling of 2011121219 in words is "two billion, eleven million, one hundred twenty-one thousand, two hundred nineteen".