12021320423017 has 2 divisors, whose sum is σ = 12021320423018. Its totient is φ = 12021320423016.

The previous prime is 12021320423003. The next prime is 12021320423023. The reversal of 12021320423017 is 71032402312021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12014064109161 + 7256313856 = 3466131^2 + 85184^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021320423017 - 2¹¹ = 12021320420969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021320423417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010660211508 + 6010660211509.

It is an arithmetic number, because the mean of its divisors is an integer number (6010660211509).

Almost surely, 2^{12021320423017} is an apocalyptic number.

It is an amenable number.

12021320423017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021320423017 is an equidigital number, since it uses as much as digits as its factorization.

12021320423017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 12021320423017 its reverse (71032402312021), we get a palindrome (83053722735038).

The spelling of 12021320423017 in words is "twelve trillion, twenty-one billion, three hundred twenty million, four hundred twenty-three thousand, seventeen".