121335541 has 2 divisors, whose sum is σ = 121335542. Its totient is φ = 121335540.

The previous prime is 121335493. The next prime is 121335559. The reversal of 121335541 is 145533121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78694641 + 42640900 = 8871^2 + 6530^2 .

It is a cyclic number.

It is not a de Polignac number, because 121335541 - 2¹⁷ = 121204469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121335241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60667770 + 60667771.

It is an arithmetic number, because the mean of its divisors is an integer number (60667771).

Almost surely, 2^121335541 is an apocalyptic number.

It is an amenable number.

121335541 is a deficient number, since it is larger than the sum of its proper divisors (1).

121335541 is an equidigital number, since it uses as much as digits as its factorization.

121335541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 121335541 is about 11015.2413046651. The cubic root of 121335541 is about 495.0655166146.

Adding to 121335541 its reverse (145533121), we get a palindrome (266868662).

The spelling of 121335541 in words is "one hundred twenty-one million, three hundred thirty-five thousand, five hundred forty-one".