121424143431 has 4 divisors (see below), whose sum is σ = 161898857912. Its totient is φ = 80949428952.

The previous prime is 121424143387. The next prime is 121424143433. The reversal of 121424143431 is 134341424121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121424143431 - 2⁷ = 121424143303 is a prime.

It is a super-2 number, since 2×121424143431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121424143433) 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 in 3 ways as a sum of consecutive naturals, for example, 20237357236 + ... + 20237357241.

It is an arithmetic number, because the mean of its divisors is an integer number (40474714478).

Almost surely, 2^121424143431 is an apocalyptic number.

121424143431 is a deficient number, since it is larger than the sum of its proper divisors (40474714481).

121424143431 is an equidigital number, since it uses as much as digits as its factorization.

121424143431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40474714480.

The product of its digits is 9216, while the sum is 30.

Adding to 121424143431 its reverse (134341424121), we get a palindrome (255765567552).

The spelling of 121424143431 in words is "one hundred twenty-one billion, four hundred twenty-four million, one hundred forty-three thousand, four hundred thirty-one".