12013033421 has 2 divisors, whose sum is σ = 12013033422. Its totient is φ = 12013033420.

The previous prime is 12013033381. The next prime is 12013033429. The reversal of 12013033421 is 12433031021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11932285225 + 80748196 = 109235^2 + 8986^2 .

It is an emirp because it is prime and its reverse (12433031021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12013033421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12013033393 and 12013033402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12013033429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006516710 + 6006516711.

It is an arithmetic number, because the mean of its divisors is an integer number (6006516711).

Almost surely, 2^12013033421 is an apocalyptic number.

It is an amenable number.

12013033421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12013033421 is an equidigital number, since it uses as much as digits as its factorization.

12013033421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12013033421 its reverse (12433031021), we get a palindrome (24446064442).

The spelling of 12013033421 in words is "twelve billion, thirteen million, thirty-three thousand, four hundred twenty-one".