121111001122109 has 2 divisors, whose sum is σ = 121111001122110. Its totient is φ = 121111001122108.

The previous prime is 121111001122061. The next prime is 121111001122169. The reversal of 121111001122109 is 901221100111121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101752673086009 + 19358328036100 = 10087253^2 + 4399810^2 .

It is a cyclic number.

It is not a de Polignac number, because 121111001122109 - 2⁸ = 121111001121853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121111001122169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555500561054 + 60555500561055.

It is an arithmetic number, because the mean of its divisors is an integer number (60555500561055).

Almost surely, 2^{121111001122109} is an apocalyptic number.

It is an amenable number.

121111001122109 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111001122109 is an equidigital number, since it uses as much as digits as its factorization.

121111001122109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 121111001122109 in words is "one hundred twenty-one trillion, one hundred eleven billion, one million, one hundred twenty-two thousand, one hundred nine".