111100203231109 has 2 divisors, whose sum is σ = 111100203231110. Its totient is φ = 111100203231108.

The previous prime is 111100203231107. The next prime is 111100203231161. The reversal of 111100203231109 is 901132302001111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60113505824100 + 50986697407009 = 7753290^2 + 7140497^2 .

It is a cyclic number.

It is not a de Polignac number, because 111100203231109 - 2¹ = 111100203231107 is a prime.

Together with 111100203231107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111100203231107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550101615554 + 55550101615555.

It is an arithmetic number, because the mean of its divisors is an integer number (55550101615555).

Almost surely, 2^{111100203231109} is an apocalyptic number.

It is an amenable number.

111100203231109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100203231109 is an equidigital number, since it uses as much as digits as its factorization.

111100203231109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 111100203231109 in words is "one hundred eleven trillion, one hundred billion, two hundred three million, two hundred thirty-one thousand, one hundred nine".