21223110312323 has 2 divisors, whose sum is σ = 21223110312324. Its totient is φ = 21223110312322.

The previous prime is 21223110312307. The next prime is 21223110312331. The reversal of 21223110312323 is 32321301132212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21223110312323 - 2⁴ = 21223110312307 is a prime.

It is a super-2 number, since 2×21223110312323² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21223110312292 and 21223110312301.

It is not a weakly prime, because it can be changed into another prime (21223110312223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611555156161 + 10611555156162.

It is an arithmetic number, because the mean of its divisors is an integer number (10611555156162).

Almost surely, 2^{21223110312323} is an apocalyptic number.

21223110312323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223110312323 is an equidigital number, since it uses as much as digits as its factorization.

21223110312323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21223110312323 its reverse (32321301132212), we get a palindrome (53544411444535).

The spelling of 21223110312323 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred ten million, three hundred twelve thousand, three hundred twenty-three".