21012302230223 has 2 divisors, whose sum is σ = 21012302230224. Its totient is φ = 21012302230222.

The previous prime is 21012302230217. The next prime is 21012302230273. The reversal of 21012302230223 is 32203220321012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012302230223 - 2⁸ = 21012302229967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012302230273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506151115111 + 10506151115112.

It is an arithmetic number, because the mean of its divisors is an integer number (10506151115112).

Almost surely, 2^{21012302230223} is an apocalyptic number.

21012302230223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012302230223 is an equidigital number, since it uses as much as digits as its factorization.

21012302230223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21012302230223 its reverse (32203220321012), we get a palindrome (53215522551235).

The spelling of 21012302230223 in words is "twenty-one trillion, twelve billion, three hundred two million, two hundred thirty thousand, two hundred twenty-three".