123121321203 has 16 divisors (see below), whose sum is σ = 182966670720. Its totient is φ = 73186667136.

The previous prime is 123121321201. The next prime is 123121321231. The reversal of 123121321203 is 302123121321.

It is not a de Polignac number, because 123121321203 - 2¹ = 123121321201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123121321203.

It is not an unprimeable number, because it can be changed into a prime (123121321201) 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, 63529125 + ... + 63531062.

It is an arithmetic number, because the mean of its divisors is an integer number (11435416920).

Almost surely, 2^123121321203 is an apocalyptic number.

123121321203 is a deficient number, since it is larger than the sum of its proper divisors (59845349517).

123121321203 is a wasteful number, since it uses less digits than its factorization.

123121321203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127060226.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123121321203 its reverse (302123121321), we get a palindrome (425244442524).

The spelling of 123121321203 in words is "one hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred three".