121501 has 2 divisors, whose sum is σ = 121502. Its totient is φ = 121500.

The previous prime is 121493. The next prime is 121507. The reversal of 121501 is 105121.

It is a happy number.

121501 is nontrivially palindromic in base 4.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105625 + 15876 = 325^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 121501 - 2³ = 121493 is a prime.

121501 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60750 + 60751.

It is an arithmetic number, because the mean of its divisors is an integer number (60751).

2¹²¹⁵⁰¹ is an apocalyptic number.

It is an amenable number.

121501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121501 is an equidigital number, since it uses as much as digits as its factorization.

121501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 121501 is about 348.5699355940. The cubic root of 121501 is about 49.5290446148.

Adding to 121501 its reverse (105121), we get a palindrome (226622).

The spelling of 121501 in words is "one hundred twenty-one thousand, five hundred one".