340003322921 has 2 divisors, whose sum is σ = 340003322922. Its totient is φ = 340003322920.

The previous prime is 340003322849. The next prime is 340003322941. The reversal of 340003322921 is 129223300043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333529350400 + 6473972521 = 577520^2 + 80461^2 .

It is an emirp because it is prime and its reverse (129223300043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340003322921 - 2¹⁴ = 340003306537 is a prime.

It is not a weakly prime, because it can be changed into another prime (340003322941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170001661460 + 170001661461.

It is an arithmetic number, because the mean of its divisors is an integer number (170001661461).

Almost surely, 2^340003322921 is an apocalyptic number.

It is an amenable number.

340003322921 is a deficient number, since it is larger than the sum of its proper divisors (1).

340003322921 is an equidigital number, since it uses as much as digits as its factorization.

340003322921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 340003322921 its reverse (129223300043), we get a palindrome (469226622964).

The spelling of 340003322921 in words is "three hundred forty billion, three million, three hundred twenty-two thousand, nine hundred twenty-one".