343536421421 has 4 divisors (see below), whose sum is σ = 344352422844. Its totient is φ = 342720420000.

The previous prime is 343536421411. The next prime is 343536421441. The reversal of 343536421421 is 124124635343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124124635343 = 179 ⋅693433717.

It can be written as a sum of positive squares in 2 ways, for example, as 137044338025 + 206492083396 = 370195^2 + 454414^2 .

It is a cyclic number.

It is not a de Polignac number, because 343536421421 - 2⁶ = 343536421357 is a prime.

It is a Duffinian number.

343536421421 is a modest number, since divided by 421421 gives 343536 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343536421411) 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, 408000080 + ... + 408000921.

It is an arithmetic number, because the mean of its divisors is an integer number (86088105711).

Almost surely, 2^343536421421 is an apocalyptic number.

It is an amenable number.

343536421421 is a deficient number, since it is larger than the sum of its proper divisors (816001423).

343536421421 is an equidigital number, since it uses as much as digits as its factorization.

343536421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816001422.

The product of its digits is 207360, while the sum is 38.

The spelling of 343536421421 in words is "three hundred forty-three billion, five hundred thirty-six million, four hundred twenty-one thousand, four hundred twenty-one".