120121957 has 2 divisors, whose sum is σ = 120121958. Its totient is φ = 120121956.

The previous prime is 120121951. The next prime is 120121997. The reversal of 120121957 is 759121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74545956 + 45576001 = 8634^2 + 6751^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121957 - 2⁷ = 120121829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060978 + 60060979.

It is an arithmetic number, because the mean of its divisors is an integer number (60060979).

Almost surely, 2^120121957 is an apocalyptic number.

It is an amenable number.

120121957 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121957 is an equidigital number, since it uses as much as digits as its factorization.

120121957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 120121957 is about 10960.0162864842. The cubic root of 120121957 is about 493.4094537501.

Adding to 120121957 its reverse (759121021), we get a palindrome (879242978).

The spelling of 120121957 in words is "one hundred twenty million, one hundred twenty-one thousand, nine hundred fifty-seven".