340433310221 has 2 divisors, whose sum is σ = 340433310222. Its totient is φ = 340433310220.

The previous prime is 340433310149. The next prime is 340433310223. The reversal of 340433310221 is 122013334043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199800060100 + 140633250121 = 446990^2 + 375011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340433310221 is a prime.

Together with 340433310223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340433310223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170216655110 + 170216655111.

It is an arithmetic number, because the mean of its divisors is an integer number (170216655111).

Almost surely, 2^340433310221 is an apocalyptic number.

It is an amenable number.

340433310221 is a deficient number, since it is larger than the sum of its proper divisors (1).

340433310221 is an equidigital number, since it uses as much as digits as its factorization.

340433310221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 340433310221 its reverse (122013334043), we get a palindrome (462446644264).

The spelling of 340433310221 in words is "three hundred forty billion, four hundred thirty-three million, three hundred ten thousand, two hundred twenty-one".