421240000000343 has 2 divisors, whose sum is σ = 421240000000344. Its totient is φ = 421240000000342.

The previous prime is 421240000000291. The next prime is 421240000000427. The reversal of 421240000000343 is 343000000042124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421240000000343 - 2²⁴ = 421239983223127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421240000000243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210620000000171 + 210620000000172.

It is an arithmetic number, because the mean of its divisors is an integer number (210620000000172).

Almost surely, 2^{421240000000343} is an apocalyptic number.

421240000000343 is a deficient number, since it is larger than the sum of its proper divisors (1).

421240000000343 is an equidigital number, since it uses as much as digits as its factorization.

421240000000343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 421240000000343 its reverse (343000000042124), we get a palindrome (764240000042467).

The spelling of 421240000000343 in words is "four hundred twenty-one trillion, two hundred forty billion, three hundred forty-three", and thus it is an aban number.