111543101 has 2 divisors, whose sum is σ = 111543102. Its totient is φ = 111543100.

The previous prime is 111543097. The next prime is 111543109. The reversal of 111543101 is 101345111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89208025 + 22335076 = 9445^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 111543101 - 2² = 111543097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111543101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111543109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55771550 + 55771551.

It is an arithmetic number, because the mean of its divisors is an integer number (55771551).

Almost surely, 2^111543101 is an apocalyptic number.

It is an amenable number.

111543101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111543101 is an equidigital number, since it uses as much as digits as its factorization.

111543101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 111543101 is about 10561.3967352808. The cubic root of 111543101 is about 481.3720883029.

Adding to 111543101 its reverse (101345111), we get a palindrome (212888212).

The spelling of 111543101 in words is "one hundred eleven million, five hundred forty-three thousand, one hundred one".