21323113001 has 2 divisors, whose sum is σ = 21323113002. Its totient is φ = 21323113000.

The previous prime is 21323112997. The next prime is 21323113027. The reversal of 21323113001 is 10031132312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21046755625 + 276357376 = 145075^2 + 16624^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323113001 - 2² = 21323112997 is a prime.

It is not a weakly prime, because it can be changed into another prime (21323143001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661556500 + 10661556501.

It is an arithmetic number, because the mean of its divisors is an integer number (10661556501).

Almost surely, 2^21323113001 is an apocalyptic number.

It is an amenable number.

21323113001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323113001 is an equidigital number, since it uses as much as digits as its factorization.

21323113001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21323113001 its reverse (10031132312), we get a palindrome (31354245313).

It can be divided in two parts, 2132311 and 3001, that added together give a palindrome (2135312).

The spelling of 21323113001 in words is "twenty-one billion, three hundred twenty-three million, one hundred thirteen thousand, one".