210434354321 has 2 divisors, whose sum is σ = 210434354322. Its totient is φ = 210434354320.

The previous prime is 210434354309. The next prime is 210434354423. The reversal of 210434354321 is 123453434012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175225960000 + 35208394321 = 418600^2 + 187639^2 .

It is a cyclic number.

It is not a de Polignac number, because 210434354321 - 2⁶ = 210434354257 is a prime.

It is not a weakly prime, because it can be changed into another prime (210434351321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105217177160 + 105217177161.

It is an arithmetic number, because the mean of its divisors is an integer number (105217177161).

Almost surely, 2^210434354321 is an apocalyptic number.

It is an amenable number.

210434354321 is a deficient number, since it is larger than the sum of its proper divisors (1).

210434354321 is an equidigital number, since it uses as much as digits as its factorization.

210434354321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 210434354321 its reverse (123453434012), we get a palindrome (333887788333).

The spelling of 210434354321 in words is "two hundred ten billion, four hundred thirty-four million, three hundred fifty-four thousand, three hundred twenty-one".