120221971 has 2 divisors, whose sum is σ = 120221972. Its totient is φ = 120221970.

The previous prime is 120221953. The next prime is 120222007. The reversal of 120221971 is 179122021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120221971 - 2⁹ = 120221459 is a prime.

It is a super-2 number, since 2×120221971² = 28906644622249682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (120221951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60110985 + 60110986.

It is an arithmetic number, because the mean of its divisors is an integer number (60110986).

Almost surely, 2^120221971 is an apocalyptic number.

120221971 is a deficient number, since it is larger than the sum of its proper divisors (1).

120221971 is an equidigital number, since it uses as much as digits as its factorization.

120221971 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 25.

The square root of 120221971 is about 10964.5780128558. The cubic root of 120221971 is about 493.5463539608.

Adding to 120221971 its reverse (179122021), we get a palindrome (299343992).

The spelling of 120221971 in words is "one hundred twenty million, two hundred twenty-one thousand, nine hundred seventy-one".