340023334400221 has 2 divisors, whose sum is σ = 340023334400222. Its totient is φ = 340023334400220.

The previous prime is 340023334400219. The next prime is 340023334400249. The reversal of 340023334400221 is 122004433320043.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338864073044121 + 1159261356100 = 18408261^2 + 1076690^2 .

It is an emirp because it is prime and its reverse (122004433320043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340023334400221 - 2¹ = 340023334400219 is a prime.

Together with 340023334400219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340023334406221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170011667200110 + 170011667200111.

It is an arithmetic number, because the mean of its divisors is an integer number (170011667200111).

Almost surely, 2^{340023334400221} is an apocalyptic number.

It is an amenable number.

340023334400221 is a deficient number, since it is larger than the sum of its proper divisors (1).

340023334400221 is an equidigital number, since it uses as much as digits as its factorization.

340023334400221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 340023334400221 its reverse (122004433320043), we get a palindrome (462027767720264).

The spelling of 340023334400221 in words is "three hundred forty trillion, twenty-three billion, three hundred thirty-four million, four hundred thousand, two hundred twenty-one".