12030311221021 has 4 divisors (see below), whose sum is σ = 12175254729792. Its totient is φ = 11885367712252.

The previous prime is 12030311221013. The next prime is 12030311221069. The reversal of 12030311221021 is 12012211303021.

12030311221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12030311221021 - 2³ = 12030311221013 is a prime.

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 12030311221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12030311201021) 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, 72471754261 + ... + 72471754426.

It is an arithmetic number, because the mean of its divisors is an integer number (3043813682448).

Almost surely, 2^{12030311221021} is an apocalyptic number.

It is an amenable number.

12030311221021 is a deficient number, since it is larger than the sum of its proper divisors (144943508771).

12030311221021 is an equidigital number, since it uses as much as digits as its factorization.

12030311221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144943508770.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12030311221021 its reverse (12012211303021), we get a palindrome (24042522524042).

The spelling of 12030311221021 in words is "twelve trillion, thirty billion, three hundred eleven million, two hundred twenty-one thousand, twenty-one".