111221222219 has 2 divisors, whose sum is σ = 111221222220. Its totient is φ = 111221222218.

The previous prime is 111221222183. The next prime is 111221222221. The reversal of 111221222219 is 912222122111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111221222219 is a prime.

It is a super-2 number, since 2×111221222219² (a number of 23 digits) contains 22 as substring.

Together with 111221222221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111221222239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610611109 + 55610611110.

It is an arithmetic number, because the mean of its divisors is an integer number (55610611110).

Almost surely, 2^111221222219 is an apocalyptic number.

111221222219 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221222219 is an equidigital number, since it uses as much as digits as its factorization.

111221222219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 26.

The spelling of 111221222219 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred nineteen".