340221656311 has 2 divisors, whose sum is σ = 340221656312. Its totient is φ = 340221656310.

The previous prime is 340221656303. The next prime is 340221656317. The reversal of 340221656311 is 113656122043.

It is a strong prime.

It is an emirp because it is prime and its reverse (113656122043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340221656311 - 2³ = 340221656303 is a prime.

It is a super-2 number, since 2×340221656311² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340221656317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170110828155 + 170110828156.

It is an arithmetic number, because the mean of its divisors is an integer number (170110828156).

Almost surely, 2^340221656311 is an apocalyptic number.

340221656311 is a deficient number, since it is larger than the sum of its proper divisors (1).

340221656311 is an equidigital number, since it uses as much as digits as its factorization.

340221656311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 340221656311 its reverse (113656122043), we get a palindrome (453877778354).

The spelling of 340221656311 in words is "three hundred forty billion, two hundred twenty-one million, six hundred fifty-six thousand, three hundred eleven".