21213100303223 has 2 divisors, whose sum is σ = 21213100303224. Its totient is φ = 21213100303222.

The previous prime is 21213100303193. The next prime is 21213100303229. The reversal of 21213100303223 is 32230300131212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213100303223 - 2³⁸ = 20938222396279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213100303229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606550151611 + 10606550151612.

It is an arithmetic number, because the mean of its divisors is an integer number (10606550151612).

Almost surely, 2^{21213100303223} is an apocalyptic number.

21213100303223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213100303223 is an equidigital number, since it uses as much as digits as its factorization.

21213100303223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21213100303223 its reverse (32230300131212), we get a palindrome (53443400434435).

The spelling of 21213100303223 in words is "twenty-one trillion, two hundred thirteen billion, one hundred million, three hundred three thousand, two hundred twenty-three".