21102002323 has 2 divisors, whose sum is σ = 21102002324. Its totient is φ = 21102002322.

The previous prime is 21102002321. The next prime is 21102002347. The reversal of 21102002323 is 32320020112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21102002323 - 2¹ = 21102002321 is a prime.

Together with 21102002321, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21102002297 and 21102002306.

It is not a weakly prime, because it can be changed into another prime (21102002321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551001161 + 10551001162.

It is an arithmetic number, because the mean of its divisors is an integer number (10551001162).

Almost surely, 2^21102002323 is an apocalyptic number.

21102002323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102002323 is an equidigital number, since it uses as much as digits as its factorization.

21102002323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21102002323 its reverse (32320020112), we get a palindrome (53422022435).

The spelling of 21102002323 in words is "twenty-one billion, one hundred two million, two thousand, three hundred twenty-three".