123311320203 has 16 divisors (see below), whose sum is σ = 169178613120. Its totient is φ = 79847148864.

The previous prime is 123311320163. The next prime is 123311320211. The reversal of 123311320203 is 302023113321.

It is not a de Polignac number, because 123311320203 - 2²⁰ = 123310271627 is a prime.

It is a super-2 number, since 2×123311320203² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123311320203.

It is not an unprimeable number, because it can be changed into a prime (123311320603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2647026 + ... + 2693207.

It is an arithmetic number, because the mean of its divisors is an integer number (10573663320).

Almost surely, 2^123311320203 is an apocalyptic number.

123311320203 is a deficient number, since it is larger than the sum of its proper divisors (45867292917).

123311320203 is a wasteful number, since it uses less digits than its factorization.

123311320203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340458.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123311320203 its reverse (302023113321), we get a palindrome (425334433524).

The spelling of 123311320203 in words is "one hundred twenty-three billion, three hundred eleven million, three hundred twenty thousand, two hundred three".