21323001151 has 2 divisors, whose sum is σ = 21323001152. Its totient is φ = 21323001150.

The previous prime is 21323001149. The next prime is 21323001223. The reversal of 21323001151 is 15110032312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21323001151 - 2¹ = 21323001149 is a prime.

Together with 21323001149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323001251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661500575 + 10661500576.

It is an arithmetic number, because the mean of its divisors is an integer number (10661500576).

Almost surely, 2^21323001151 is an apocalyptic number.

21323001151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323001151 is an equidigital number, since it uses as much as digits as its factorization.

21323001151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 21323001151 its reverse (15110032312), we get a palindrome (36433033463).

The spelling of 21323001151 in words is "twenty-one billion, three hundred twenty-three million, one thousand, one hundred fifty-one".