21000312233323 has 2 divisors, whose sum is σ = 21000312233324. Its totient is φ = 21000312233322.

The previous prime is 21000312233293. The next prime is 21000312233393. The reversal of 21000312233323 is 32333221300012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000312233323 - 2²⁹ = 20999775362411 is a prime.

It is a super-2 number, since 2×21000312233323² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21000312233393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500156116661 + 10500156116662.

It is an arithmetic number, because the mean of its divisors is an integer number (10500156116662).

Almost surely, 2^{21000312233323} is an apocalyptic number.

21000312233323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000312233323 is an equidigital number, since it uses as much as digits as its factorization.

21000312233323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21000312233323 its reverse (32333221300012), we get a palindrome (53333533533335).

The spelling of 21000312233323 in words is "twenty-one trillion, three hundred twelve million, two hundred thirty-three thousand, three hundred twenty-three".