121241357 has 2 divisors, whose sum is σ = 121241358. Its totient is φ = 121241356.

The previous prime is 121241333. The next prime is 121241359. The reversal of 121241357 is 753142121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120868036 + 373321 = 10994^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 121241357 - 2⁶ = 121241293 is a prime.

Together with 121241359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121241359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60620678 + 60620679.

It is an arithmetic number, because the mean of its divisors is an integer number (60620679).

Almost surely, 2^121241357 is an apocalyptic number.

It is an amenable number.

121241357 is a deficient number, since it is larger than the sum of its proper divisors (1).

121241357 is an equidigital number, since it uses as much as digits as its factorization.

121241357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 121241357 is about 11010.9653073652. The cubic root of 121241357 is about 494.9373889451.

Adding to 121241357 its reverse (753142121), we get a palindrome (874383478).

The spelling of 121241357 in words is "one hundred twenty-one million, two hundred forty-one thousand, three hundred fifty-seven".