120021120013 has 2 divisors, whose sum is σ = 120021120014. Its totient is φ = 120021120012.

The previous prime is 120021119987. The next prime is 120021120047. The reversal of 120021120013 is 310021120021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61545174889 + 58475945124 = 248083^2 + 241818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021119975 and 120021120002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120021120073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010560006 + 60010560007.

It is an arithmetic number, because the mean of its divisors is an integer number (60010560007).

Almost surely, 2^120021120013 is an apocalyptic number.

It is an amenable number.

120021120013 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021120013 is an equidigital number, since it uses as much as digits as its factorization.

120021120013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 120021120013 its reverse (310021120021), we get a palindrome (430042240034).

The spelling of 120021120013 in words is "one hundred twenty billion, twenty-one million, one hundred twenty thousand, thirteen".