110121120509 has 2 divisors, whose sum is σ = 110121120510. Its totient is φ = 110121120508.

The previous prime is 110121120491. The next prime is 110121120511. The reversal of 110121120509 is 905021121011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108337747609 + 1783372900 = 329147^2 + 42230^2 .

It is a cyclic number.

It is not a de Polignac number, because 110121120509 - 2²⁸ = 109852685053 is a prime.

It is a super-2 number, since 2×110121120509² (a number of 23 digits) contains 22 as substring.

Together with 110121120511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110121122509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060560254 + 55060560255.

It is an arithmetic number, because the mean of its divisors is an integer number (55060560255).

Almost surely, 2^110121120509 is an apocalyptic number.

It is an amenable number.

110121120509 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121120509 is an equidigital number, since it uses as much as digits as its factorization.

110121120509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 23.

The spelling of 110121120509 in words is "one hundred ten billion, one hundred twenty-one million, one hundred twenty thousand, five hundred nine".