211121219 has 4 divisors (see below), whose sum is σ = 211155360. Its totient is φ = 211087080.

The previous prime is 211121213. The next prime is 211121237. The reversal of 211121219 is 912121112.

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 211121219 - 2⁴ = 211121203 is a prime.

It is a super-2 number, since 2×211121219² = 89144338224091922, 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 211121219.

It is not an unprimeable number, because it can be changed into a prime (211121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4904 + ... + 21125.

It is an arithmetic number, because the mean of its divisors is an integer number (52788840).

Almost surely, 2^211121219 is an apocalyptic number.

211121219 is a deficient number, since it is larger than the sum of its proper divisors (34141).

211121219 is an equidigital number, since it uses as much as digits as its factorization.

211121219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34140.

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

The square root of 211121219 is about 14530.0109772842. The cubic root of 211121219 is about 595.4481655143.

The spelling of 211121219 in words is "two hundred eleven million, one hundred twenty-one thousand, two hundred nineteen".