110121202109 has 2 divisors, whose sum is σ = 110121202110. Its totient is φ = 110121202108.

The previous prime is 110121202063. The next prime is 110121202171. The reversal of 110121202109 is 901202121011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105232116025 + 4889086084 = 324395^2 + 69922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110121202109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110121202199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060601054 + 55060601055.

It is an arithmetic number, because the mean of its divisors is an integer number (55060601055).

Almost surely, 2^110121202109 is an apocalyptic number.

It is an amenable number.

110121202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121202109 is an equidigital number, since it uses as much as digits as its factorization.

110121202109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

It can be divided in two parts, 11012 and 1202109, that added together give a palindrome (1213121).

The spelling of 110121202109 in words is "one hundred ten billion, one hundred twenty-one million, two hundred two thousand, one hundred nine".