121232143 has 2 divisors, whose sum is σ = 121232144. Its totient is φ = 121232142.

The previous prime is 121232123. The next prime is 121232159. The reversal of 121232143 is 341232121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121232143 - 2⁹ = 121231631 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121232143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121232123) 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, 60616071 + 60616072.

It is an arithmetic number, because the mean of its divisors is an integer number (60616072).

Almost surely, 2^121232143 is an apocalyptic number.

121232143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121232143 is an equidigital number, since it uses as much as digits as its factorization.

121232143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 121232143 is about 11010.5468983153. The cubic root of 121232143 is about 494.9248506806.

Adding to 121232143 its reverse (341232121), we get a palindrome (462464264).

The spelling of 121232143 in words is "one hundred twenty-one million, two hundred thirty-two thousand, one hundred forty-three".