21302123220223 has 2 divisors, whose sum is σ = 21302123220224. Its totient is φ = 21302123220222.

The previous prime is 21302123220163. The next prime is 21302123220229. The reversal of 21302123220223 is 32202232120312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302123220223 - 2³³ = 21293533285631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302123220229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651061610111 + 10651061610112.

It is an arithmetic number, because the mean of its divisors is an integer number (10651061610112).

Almost surely, 2^{21302123220223} is an apocalyptic number.

21302123220223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302123220223 is an equidigital number, since it uses as much as digits as its factorization.

21302123220223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21302123220223 its reverse (32202232120312), we get a palindrome (53504355340535).

The spelling of 21302123220223 in words is "twenty-one trillion, three hundred two billion, one hundred twenty-three million, two hundred twenty thousand, two hundred twenty-three".