121543153 has 2 divisors, whose sum is σ = 121543154. Its totient is φ = 121543152.

The previous prime is 121543099. The next prime is 121543181. The reversal of 121543153 is 351345121.

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., 74442384 + 47100769 = 8628^2 + 6863^2 .

It is a cyclic number.

It is not a de Polignac number, because 121543153 - 2²⁵ = 87988721 is a prime.

It is not a weakly prime, because it can be changed into another prime (121543453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60771576 + 60771577.

It is an arithmetic number, because the mean of its divisors is an integer number (60771577).

Almost surely, 2^121543153 is an apocalyptic number.

It is an amenable number.

121543153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121543153 is an equidigital number, since it uses as much as digits as its factorization.

121543153 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 121543153 is about 11024.6611285790. The cubic root of 121543153 is about 495.3477174580.

Adding to 121543153 its reverse (351345121), we get a palindrome (472888274).

The spelling of 121543153 in words is "one hundred twenty-one million, five hundred forty-three thousand, one hundred fifty-three".