346005202421 has 4 divisors (see below), whose sum is σ = 346049838732. Its totient is φ = 345960566112.

The previous prime is 346005202393. The next prime is 346005202441. The reversal of 346005202421 is 124202500643.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124202500643 = 13 ⋅9554038511.

It can be written as a sum of positive squares in 2 ways, for example, as 180446544100 + 165558658321 = 424790^2 + 406889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-346005202421 is a prime.

It is a super-3 number, since 3×346005202421³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (346005202441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22306526 + ... + 22322031.

It is an arithmetic number, because the mean of its divisors is an integer number (86512459683).

Almost surely, 2^346005202421 is an apocalyptic number.

It is an amenable number.

346005202421 is a deficient number, since it is larger than the sum of its proper divisors (44636311).

346005202421 is an equidigital number, since it uses as much as digits as its factorization.

346005202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44636310.

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 346005202421 in words is "three hundred forty-six billion, five million, two hundred two thousand, four hundred twenty-one".