123001120109 has 6 divisors (see below), whose sum is σ = 143082935694. Its totient is φ = 105429531480.

The previous prime is 123001120091. The next prime is 123001120111. The reversal of 123001120109 is 901021100321.

It can be written as a sum of positive squares in only one way, i.e., 85799197225 + 37201922884 = 292915^2 + 192878^2 .

It is not a de Polignac number, because 123001120109 - 2⁸ = 123001119853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123001120159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1255113422 + ... + 1255113519.

It is an arithmetic number, because the mean of its divisors is an integer number (23847155949).

Almost surely, 2^123001120109 is an apocalyptic number.

It is an amenable number.

123001120109 is a deficient number, since it is larger than the sum of its proper divisors (20081815585).

123001120109 is an equidigital number, since it uses as much as digits as its factorization.

123001120109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510226955 (or 2510226948 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 123001120109 in words is "one hundred twenty-three billion, one million, one hundred twenty thousand, one hundred nine".