111010121010109 has 2 divisors, whose sum is σ = 111010121010110. Its totient is φ = 111010121010108.

The previous prime is 111010121010083. The next prime is 111010121010133. The reversal of 111010121010109 is 901010121010111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64756220765625 + 46253900244484 = 8047125^2 + 6801022^2 .

It is a cyclic number.

It is not a de Polignac number, because 111010121010109 - 2⁷ = 111010121009981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111010121010169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505060505054 + 55505060505055.

It is an arithmetic number, because the mean of its divisors is an integer number (55505060505055).

Almost surely, 2^{111010121010109} is an apocalyptic number.

It is an amenable number.

111010121010109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111010121010109 is an equidigital number, since it uses as much as digits as its factorization.

111010121010109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 19.

It can be divided in two parts, 11101012 and 1010109, that added together give a palindrome (12111121).

The spelling of 111010121010109 in words is "one hundred eleven trillion, ten billion, one hundred twenty-one million, ten thousand, one hundred nine".