21210200011223 has 2 divisors, whose sum is σ = 21210200011224. Its totient is φ = 21210200011222.

The previous prime is 21210200011199. The next prime is 21210200011229. The reversal of 21210200011223 is 32211000201212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21210200011223 - 2¹² = 21210200007127 is a prime.

It is a super-3 number, since 3×21210200011223³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210200011229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605100005611 + 10605100005612.

It is an arithmetic number, because the mean of its divisors is an integer number (10605100005612).

Almost surely, 2^{21210200011223} is an apocalyptic number.

21210200011223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210200011223 is an equidigital number, since it uses as much as digits as its factorization.

21210200011223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21210200011223 its reverse (32211000201212), we get a palindrome (53421200212435).

The spelling of 21210200011223 in words is "twenty-one trillion, two hundred ten billion, two hundred million, eleven thousand, two hundred twenty-three".