12030311203121 has 4 divisors (see below), whose sum is σ = 12445149520500. Its totient is φ = 11615472885744.

The previous prime is 12030311203111. The next prime is 12030311203133. The reversal of 12030311203121 is 12130211303021.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8170221889600 + 3860089313521 = 2858360^2 + 1964711^2 .

It is a cyclic number.

It is not a de Polignac number, because 12030311203121 - 2³⁸ = 11755433296177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12030311203093 and 12030311203102.

It is not an unprimeable number, because it can be changed into a prime (12030311203111) 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, 207419158646 + ... + 207419158703.

It is an arithmetic number, because the mean of its divisors is an integer number (3111287380125).

Almost surely, 2^{12030311203121} is an apocalyptic number.

It is an amenable number.

12030311203121 is a deficient number, since it is larger than the sum of its proper divisors (414838317379).

12030311203121 is an equidigital number, since it uses as much as digits as its factorization.

12030311203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414838317378.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 12030311203121 its reverse (12130211303021), we get a palindrome (24160522506142).

The spelling of 12030311203121 in words is "twelve trillion, thirty billion, three hundred eleven million, two hundred three thousand, one hundred twenty-one".