120317621 has 2 divisors, whose sum is σ = 120317622. Its totient is φ = 120317620.

The previous prime is 120317597. The next prime is 120317677. The reversal of 120317621 is 126713021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106708900 + 13608721 = 10330^2 + 3689^2 .

It is an emirp because it is prime and its reverse (126713021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120317621 - 2²² = 116123317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120317221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60158810 + 60158811.

It is an arithmetic number, because the mean of its divisors is an integer number (60158811).

Almost surely, 2^120317621 is an apocalyptic number.

It is an amenable number.

120317621 is a deficient number, since it is larger than the sum of its proper divisors (1).

120317621 is an equidigital number, since it uses as much as digits as its factorization.

120317621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 120317621 is about 10968.9389186010. The cubic root of 120317621 is about 493.6772096722.

The spelling of 120317621 in words is "one hundred twenty million, three hundred seventeen thousand, six hundred twenty-one".