123203123011 has 4 divisors (see below), whose sum is σ = 123207292800. Its totient is φ = 123198953224.

The previous prime is 123203123003. The next prime is 123203123041. The reversal of 123203123011 is 110321302321.

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 123203123011 - 2³ = 123203123003 is a prime.

It is a super-2 number, since 2×123203123011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123203123011.

It is not an unprimeable number, because it can be changed into a prime (123203123041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040256 + ... + 2099773.

It is an arithmetic number, because the mean of its divisors is an integer number (30801823200).

Almost surely, 2^123203123011 is an apocalyptic number.

123203123011 is a deficient number, since it is larger than the sum of its proper divisors (4169789).

123203123011 is an equidigital number, since it uses as much as digits as its factorization.

123203123011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169788.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123203123011 its reverse (110321302321), we get a palindrome (233524425332).

The spelling of 123203123011 in words is "one hundred twenty-three billion, two hundred three million, one hundred twenty-three thousand, eleven".