11111221220219 has 4 divisors (see below), whose sum is σ = 11111483449560. Its totient is φ = 11110958990880.

The previous prime is 11111221220171. The next prime is 11111221220237. The reversal of 11111221220219 is 91202212211111.

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-11111221220219 is a prime.

It is a super-2 number, since 2×11111221220219² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111221220249) 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, 131051102 + ... + 131135859.

It is an arithmetic number, because the mean of its divisors is an integer number (2777870862390).

Almost surely, 2^{11111221220219} is an apocalyptic number.

11111221220219 is a deficient number, since it is larger than the sum of its proper divisors (262229341).

11111221220219 is an equidigital number, since it uses as much as digits as its factorization.

11111221220219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262229340.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 11111221220219 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, two hundred nineteen".