121157 has 2 divisors, whose sum is σ = 121158. Its totient is φ = 121156.

The previous prime is 121151. The next prime is 121169. The reversal of 121157 is 751121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83521 + 37636 = 289^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 121157 - 2¹⁴ = 104773 is a prime.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60578 + 60579.

It is an arithmetic number, because the mean of its divisors is an integer number (60579).

2¹²¹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

121157 is a deficient number, since it is larger than the sum of its proper divisors (1).

121157 is an equidigital number, since it uses as much as digits as its factorization.

121157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70, while the sum is 17.

The square root of 121157 is about 348.0761410956. The cubic root of 121157 is about 49.4822573557.

Adding to 121157 its reverse (751121), we get a palindrome (872278).

The spelling of 121157 in words is "one hundred twenty-one thousand, one hundred fifty-seven".