1242323124431 has 4 divisors (see below), whose sum is σ = 1242538102200. Its totient is φ = 1242108146664.

The previous prime is 1242323124397. The next prime is 1242323124439. The reversal of 1242323124431 is 1344213232421.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242323124431 is a prime.

It is a super-2 number, since 2×1242323124431² (a number of 25 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 (1242323124439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107480216 + ... + 107491773.

It is an arithmetic number, because the mean of its divisors is an integer number (310634525550).

Almost surely, 2^{1242323124431} is an apocalyptic number.

1242323124431 is a deficient number, since it is larger than the sum of its proper divisors (214977769).

1242323124431 is an equidigital number, since it uses as much as digits as its factorization.

1242323124431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214977768.

The product of its digits is 27648, while the sum is 32.

Adding to 1242323124431 its reverse (1344213232421), we get a palindrome (2586536356852).

The spelling of 1242323124431 in words is "one trillion, two hundred forty-two billion, three hundred twenty-three million, one hundred twenty-four thousand, four hundred thirty-one".