344205421421 has 16 divisors (see below), whose sum is σ = 364130457600. Its totient is φ = 324838684800.

The previous prime is 344205421361. The next prime is 344205421457. The reversal of 344205421421 is 124124502443.

It is a cyclic number.

It is not a de Polignac number, because 344205421421 - 2¹⁰ = 344205420397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344205421481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2979740 + ... + 3093098.

It is an arithmetic number, because the mean of its divisors is an integer number (22758153600).

Almost surely, 2^344205421421 is an apocalyptic number.

344205421421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

344205421421 is a deficient number, since it is larger than the sum of its proper divisors (19925036179).

344205421421 is a wasteful number, since it uses less digits than its factorization.

344205421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115820.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 344205421421 its reverse (124124502443), we get a palindrome (468329923864).

The spelling of 344205421421 in words is "three hundred forty-four billion, two hundred five million, four hundred twenty-one thousand, four hundred twenty-one".