111421819417 has 2 divisors, whose sum is σ = 111421819418. Its totient is φ = 111421819416.

The previous prime is 111421819363. The next prime is 111421819433. The reversal of 111421819417 is 714918124111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83718214281 + 27703605136 = 289341^2 + 166444^2 .

It is an emirp because it is prime and its reverse (714918124111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111421819417 - 2³¹ = 109274335769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111421819417.

It is not a weakly prime, because it can be changed into another prime (111421889417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55710909708 + 55710909709.

It is an arithmetic number, because the mean of its divisors is an integer number (55710909709).

Almost surely, 2^111421819417 is an apocalyptic number.

It is an amenable number.

111421819417 is a deficient number, since it is larger than the sum of its proper divisors (1).

111421819417 is an equidigital number, since it uses as much as digits as its factorization.

111421819417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 40.

The spelling of 111421819417 in words is "one hundred eleven billion, four hundred twenty-one million, eight hundred nineteen thousand, four hundred seventeen".