21201211223323 has 2 divisors, whose sum is σ = 21201211223324. Its totient is φ = 21201211223322.

The previous prime is 21201211223299. The next prime is 21201211223327. The reversal of 21201211223323 is 32332211210212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201211223323 - 2¹⁷ = 21201211092251 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201211223327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600605611661 + 10600605611662.

It is an arithmetic number, because the mean of its divisors is an integer number (10600605611662).

Almost surely, 2^{21201211223323} is an apocalyptic number.

21201211223323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201211223323 is an equidigital number, since it uses as much as digits as its factorization.

21201211223323 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 25.

Adding to 21201211223323 its reverse (32332211210212), we get a palindrome (53533422433535).

The spelling of 21201211223323 in words is "twenty-one trillion, two hundred one billion, two hundred eleven million, two hundred twenty-three thousand, three hundred twenty-three".