343434421021 has 2 divisors, whose sum is σ = 343434421022. Its totient is φ = 343434421020.

The previous prime is 343434421007. The next prime is 343434421037. The reversal of 343434421021 is 120124434343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343120635225 + 313785796 = 585765^2 + 17714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343434421021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343434421081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171717210510 + 171717210511.

It is an arithmetic number, because the mean of its divisors is an integer number (171717210511).

Almost surely, 2^343434421021 is an apocalyptic number.

It is an amenable number.

343434421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

343434421021 is an equidigital number, since it uses as much as digits as its factorization.

343434421021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 343434421021 its reverse (120124434343), we get a palindrome (463558855364).

The spelling of 343434421021 in words is "three hundred forty-three billion, four hundred thirty-four million, four hundred twenty-one thousand, twenty-one".