340121314721 has 2 divisors, whose sum is σ = 340121314722. Its totient is φ = 340121314720.

The previous prime is 340121314697. The next prime is 340121314733. The reversal of 340121314721 is 127413121043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316670680225 + 23450634496 = 562735^2 + 153136^2 .

It is a cyclic number.

It is not a de Polignac number, because 340121314721 - 2⁶ = 340121314657 is a prime.

It is not a weakly prime, because it can be changed into another prime (340121314121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170060657360 + 170060657361.

It is an arithmetic number, because the mean of its divisors is an integer number (170060657361).

Almost surely, 2^340121314721 is an apocalyptic number.

It is an amenable number.

340121314721 is a deficient number, since it is larger than the sum of its proper divisors (1).

340121314721 is an equidigital number, since it uses as much as digits as its factorization.

340121314721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 340121314721 its reverse (127413121043), we get a palindrome (467534435764).

The spelling of 340121314721 in words is "three hundred forty billion, one hundred twenty-one million, three hundred fourteen thousand, seven hundred twenty-one".