21323221301 has 2 divisors, whose sum is σ = 21323221302. Its totient is φ = 21323221300.

The previous prime is 21323221291. The next prime is 21323221313. The reversal of 21323221301 is 10312232312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12371223076 + 8951998225 = 111226^2 + 94615^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323221301 - 2¹⁸ = 21322959157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323221321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661610650 + 10661610651.

It is an arithmetic number, because the mean of its divisors is an integer number (10661610651).

Almost surely, 2^21323221301 is an apocalyptic number.

It is an amenable number.

21323221301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323221301 is an equidigital number, since it uses as much as digits as its factorization.

21323221301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21323221301 its reverse (10312232312), we get a palindrome (31635453613).

The spelling of 21323221301 in words is "twenty-one billion, three hundred twenty-three million, two hundred twenty-one thousand, three hundred one".