1231144220434 has 4 divisors (see below), whose sum is σ = 1846716330654. Its totient is φ = 615572110216.

The previous prime is 1231144220419. The next prime is 1231144220441. The reversal of 1231144220434 is 4340224411321.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1093352553225 + 137791667209 = 1045635^2 + 371203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1231144220396 and 1231144220405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307786055107 + ... + 307786055110.

Almost surely, 2^{1231144220434} is an apocalyptic number.

1231144220434 is a deficient number, since it is larger than the sum of its proper divisors (615572110220).

1231144220434 is an equidigital number, since it uses as much as digits as its factorization.

1231144220434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615572110219.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 1231144220434 its reverse (4340224411321), we get a palindrome (5571368631755).

The spelling of 1231144220434 in words is "one trillion, two hundred thirty-one billion, one hundred forty-four million, two hundred twenty thousand, four hundred thirty-four".