123120011 has 4 divisors (see below), whose sum is σ = 140708592. Its totient is φ = 105531432.

The previous prime is 123119963. The next prime is 123120013. The reversal of 123120011 is 110021321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123120011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123119974 and 123120001.

It is not an unprimeable number, because it can be changed into a prime (123120013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8794280 + ... + 8794293.

It is an arithmetic number, because the mean of its divisors is an integer number (35177148).

Almost surely, 2^123120011 is an apocalyptic number.

123120011 is a deficient number, since it is larger than the sum of its proper divisors (17588581).

123120011 is an equidigital number, since it uses as much as digits as its factorization.

123120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17588580.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 123120011 is about 11095.9457010207. The cubic root of 123120011 is about 497.4806753266.

Adding to 123120011 its reverse (110021321), we get a palindrome (233141332).

The spelling of 123120011 in words is "one hundred twenty-three million, one hundred twenty thousand, eleven".