121424143 has 2 divisors, whose sum is σ = 121424144. Its totient is φ = 121424142.

The previous prime is 121424141. The next prime is 121424159. The reversal of 121424143 is 341424121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121424143 - 2¹ = 121424141 is a prime.

Together with 121424141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121424141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60712071 + 60712072.

It is an arithmetic number, because the mean of its divisors is an integer number (60712072).

Almost surely, 2^121424143 is an apocalyptic number.

121424143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121424143 is an equidigital number, since it uses as much as digits as its factorization.

121424143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

The square root of 121424143 is about 11019.2623618825. The cubic root of 121424143 is about 495.1859900337.

Subtracting from 121424143 its sum of digits (22), we obtain a palindrome (121424121).

Adding to 121424143 its reverse (341424121), we get a palindrome (462848264).

The spelling of 121424143 in words is "one hundred twenty-one million, four hundred twenty-four thousand, one hundred forty-three".