123005011 has 4 divisors (see below), whose sum is σ = 123029712. Its totient is φ = 122980312.

The previous prime is 123005009. The next prime is 123005089. The reversal of 123005011 is 110500321.

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

It is a cyclic number.

It is not a de Polignac number, because 123005011 - 2¹ = 123005009 is a prime.

It is a super-3 number, since 3×123005011³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123004982 and 123005000.

It is not an unprimeable number, because it can be changed into a prime (123005611) 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, 1975 + ... + 15808.

It is an arithmetic number, because the mean of its divisors is an integer number (30757428).

Almost surely, 2^123005011 is an apocalyptic number.

123005011 is a deficient number, since it is larger than the sum of its proper divisors (24701).

123005011 is an equidigital number, since it uses as much as digits as its factorization.

123005011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24700.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 123005011 is about 11090.7624174355. The cubic root of 123005011 is about 497.3257368000.

Adding to 123005011 its reverse (110500321), we get a palindrome (233505332).

The spelling of 123005011 in words is "one hundred twenty-three million, five thousand, eleven".