1242131344321 has 4 divisors (see below), whose sum is σ = 1419578679232. Its totient is φ = 1064684009412.

The previous prime is 1242131344243. The next prime is 1242131344331. The reversal of 1242131344321 is 1234431312421.

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.

It is a cyclic number.

It is not a de Polignac number, because 1242131344321 - 2⁹ = 1242131343809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242131344331) 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, 88723667445 + ... + 88723667458.

It is an arithmetic number, because the mean of its divisors is an integer number (354894669808).

Almost surely, 2^{1242131344321} is an apocalyptic number.

It is an amenable number.

1242131344321 is a deficient number, since it is larger than the sum of its proper divisors (177447334911).

1242131344321 is an equidigital number, since it uses as much as digits as its factorization.

1242131344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177447334910.

The product of its digits is 13824, while the sum is 31.

Adding to 1242131344321 its reverse (1234431312421), we get a palindrome (2476562656742).

The spelling of 1242131344321 in words is "one trillion, two hundred forty-two billion, one hundred thirty-one million, three hundred forty-four thousand, three hundred twenty-one".