111221102223919 has 2 divisors, whose sum is σ = 111221102223920. Its totient is φ = 111221102223918.

The previous prime is 111221102223911. The next prime is 111221102224003. The reversal of 111221102223919 is 919322201122111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111221102223919 - 2³ = 111221102223911 is a prime.

It is a super-2 number, since 2×111221102223919² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221102223911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610551111959 + 55610551111960.

It is an arithmetic number, because the mean of its divisors is an integer number (55610551111960).

Almost surely, 2^{111221102223919} is an apocalyptic number.

111221102223919 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221102223919 is an equidigital number, since it uses as much as digits as its factorization.

111221102223919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 111221102223919 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty-three thousand, nine hundred nineteen".