121357 has 2 divisors, whose sum is σ = 121358. Its totient is φ = 121356.

The previous prime is 121351. The next prime is 121367. The reversal of 121357 is 753121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111556 + 9801 = 334^2 + 99^2 .

It is a cyclic number.

It is not a de Polignac number, because 121357 - 2³ = 121349 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60678 + 60679.

It is an arithmetic number, because the mean of its divisors is an integer number (60679).

2¹²¹³⁵⁷ is an apocalyptic number.

It is an amenable number.

121357 is a deficient number, since it is larger than the sum of its proper divisors (1).

121357 is an equidigital number, since it uses as much as digits as its factorization.

121357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 19.

The square root of 121357 is about 348.3633160940. The cubic root of 121357 is about 49.5094700107.

Adding to 121357 its reverse (753121), we get a palindrome (874478).

It can be divided in two parts, 12 and 1357, that added together give a square (1369 = 37²).

The spelling of 121357 in words is "one hundred twenty-one thousand, three hundred fifty-seven".