120021221317 has 2 divisors, whose sum is σ = 120021221318. Its totient is φ = 120021221316.

The previous prime is 120021221303. The next prime is 120021221323. The reversal of 120021221317 is 713122120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98140599076 + 21880622241 = 313274^2 + 147921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021221317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120021221017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010610658 + 60010610659.

It is an arithmetic number, because the mean of its divisors is an integer number (60010610659).

Almost surely, 2^120021221317 is an apocalyptic number.

It is an amenable number.

120021221317 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021221317 is an equidigital number, since it uses as much as digits as its factorization.

120021221317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 120021221317 its reverse (713122120021), we get a palindrome (833143341338).

The spelling of 120021221317 in words is "one hundred twenty billion, twenty-one million, two hundred twenty-one thousand, three hundred seventeen".