111111013223501 has 2 divisors, whose sum is σ = 111111013223502. Its totient is φ = 111111013223500.

The previous prime is 111111013223411. The next prime is 111111013223569. The reversal of 111111013223501 is 105322310111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103095064973476 + 8015948250025 = 10153574^2 + 2831245^2 .

It is an emirp because it is prime and its reverse (105322310111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111111013223501 - 2¹⁰ = 111111013222477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111013223801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555506611750 + 55555506611751.

It is an arithmetic number, because the mean of its divisors is an integer number (55555506611751).

Almost surely, 2^{111111013223501} is an apocalyptic number.

It is an amenable number.

111111013223501 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111013223501 is an equidigital number, since it uses as much as digits as its factorization.

111111013223501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 23.

Adding to 111111013223501 its reverse (105322310111111), we get a palindrome (216433323334612).

The spelling of 111111013223501 in words is "one hundred eleven trillion, one hundred eleven billion, thirteen million, two hundred twenty-three thousand, five hundred one".