123011001 has 16 divisors (see below), whose sum is σ = 182593600. Its totient is φ = 81847584.

The previous prime is 123010999. The next prime is 123011017. The reversal of 123011001 is 100110321.

It is not a de Polignac number, because 123011001 - 2¹ = 123010999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123011041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10605 + ... + 18933.

It is an arithmetic number, because the mean of its divisors is an integer number (11412100).

Almost surely, 2^123011001 is an apocalyptic number.

It is an amenable number.

123011001 is a deficient number, since it is larger than the sum of its proper divisors (59582599).

123011001 is an equidigital number, since it uses as much as digits as its factorization.

123011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885 (or 8879 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 123011001 is about 11091.0324587028. The cubic root of 123011001 is about 497.3338094597. Note that the first 3 decimals are identical.

Adding to 123011001 its reverse (100110321), we get a palindrome (223121322).

The spelling of 123011001 in words is "one hundred twenty-three million, eleven thousand, one".