345633223021 has 2 divisors, whose sum is σ = 345633223022. Its totient is φ = 345633223020.

The previous prime is 345633223009. The next prime is 345633223049. The reversal of 345633223021 is 120322336543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345514718025 + 118504996 = 587805^2 + 10886^2 .

It is a cyclic number.

It is not a de Polignac number, because 345633223021 - 2¹¹ = 345633220973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345633223121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172816611510 + 172816611511.

It is an arithmetic number, because the mean of its divisors is an integer number (172816611511).

Almost surely, 2^345633223021 is an apocalyptic number.

It is an amenable number.

345633223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

345633223021 is an equidigital number, since it uses as much as digits as its factorization.

345633223021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 34.

Adding to 345633223021 its reverse (120322336543), we get a palindrome (465955559564).

The spelling of 345633223021 in words is "three hundred forty-five billion, six hundred thirty-three million, two hundred twenty-three thousand, twenty-one".