122431124521 has 4 divisors (see below), whose sum is σ = 125036042112. Its totient is φ = 119826206932.

The previous prime is 122431124513. The next prime is 122431124551. The reversal of 122431124521 is 125421134221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125421134221 = 14431 ⋅8691091.

It is a cyclic number.

It is not a de Polignac number, because 122431124521 - 2³ = 122431124513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122431124521.

It is not an unprimeable number, because it can be changed into a prime (122431124551) 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, 1302458725 + ... + 1302458818.

It is an arithmetic number, because the mean of its divisors is an integer number (31259010528).

Almost surely, 2^122431124521 is an apocalyptic number.

It is an amenable number.

122431124521 is a deficient number, since it is larger than the sum of its proper divisors (2604917591).

122431124521 is an equidigital number, since it uses as much as digits as its factorization.

122431124521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604917590.

The product of its digits is 3840, while the sum is 28.

Adding to 122431124521 its reverse (125421134221), we get a palindrome (247852258742).

The spelling of 122431124521 in words is "one hundred twenty-two billion, four hundred thirty-one million, one hundred twenty-four thousand, five hundred twenty-one".