344121233131421 has 4 divisors (see below), whose sum is σ = 344161373258172. Its totient is φ = 344081093004672.

The previous prime is 344121233131391. The next prime is 344121233131531. The reversal of 344121233131421 is 124131332121443.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35997240052900 + 308123993078521 = 5999770^2 + 17553461^2 .

It is a cyclic number.

It is not a de Polignac number, because 344121233131421 - 2³⁰ = 344120159389597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344121233133421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20070050516 + ... + 20070067661.

It is an arithmetic number, because the mean of its divisors is an integer number (86040343314543).

Almost surely, 2^{344121233131421} is an apocalyptic number.

It is an amenable number.

344121233131421 is a deficient number, since it is larger than the sum of its proper divisors (40140126751).

344121233131421 is an equidigital number, since it uses as much as digits as its factorization.

344121233131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40140126750.

The product of its digits is 41472, while the sum is 35.

Adding to 344121233131421 its reverse (124131332121443), we get a palindrome (468252565252864).

The spelling of 344121233131421 in words is "three hundred forty-four trillion, one hundred twenty-one billion, two hundred thirty-three million, one hundred thirty-one thousand, four hundred twenty-one".