340034350021 has 2 divisors, whose sum is σ = 340034350022. Its totient is φ = 340034350020.

The previous prime is 340034350001. The next prime is 340034350043. The reversal of 340034350021 is 120053430043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338911429921 + 1122920100 = 582161^2 + 33510^2 .

It is an emirp because it is prime and its reverse (120053430043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340034350021 - 2²⁹ = 339497479109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340034350001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170017175010 + 170017175011.

It is an arithmetic number, because the mean of its divisors is an integer number (170017175011).

Almost surely, 2^340034350021 is an apocalyptic number.

It is an amenable number.

340034350021 is a deficient number, since it is larger than the sum of its proper divisors (1).

340034350021 is an equidigital number, since it uses as much as digits as its factorization.

340034350021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 340034350021 its reverse (120053430043), we get a palindrome (460087780064).

The spelling of 340034350021 in words is "three hundred forty billion, thirty-four million, three hundred fifty thousand, twenty-one".