120121997 has 2 divisors, whose sum is σ = 120121998. Its totient is φ = 120121996.

The previous prime is 120121957. The next prime is 120122003. The reversal of 120121997 is 799121021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75151561 + 44970436 = 8669^2 + 6706^2 .

It is an emirp because it is prime and its reverse (799121021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120121997 - 2¹⁴ = 120105613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060998 + 60060999.

It is an arithmetic number, because the mean of its divisors is an integer number (60060999).

Almost surely, 2^120121997 is an apocalyptic number.

It is an amenable number.

120121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121997 is an equidigital number, since it uses as much as digits as its factorization.

120121997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 120121997 is about 10960.0181112989. The cubic root of 120121997 is about 493.4095085177.

The spelling of 120121997 in words is "one hundred twenty million, one hundred twenty-one thousand, nine hundred ninety-seven".