21202323097 has 2 divisors, whose sum is σ = 21202323098. Its totient is φ = 21202323096.

The previous prime is 21202323089. The next prime is 21202323127. The reversal of 21202323097 is 79032320212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21200524816 + 1798281 = 145604^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202323097 - 2³ = 21202323089 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202323017) 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, 10601161548 + 10601161549.

It is an arithmetic number, because the mean of its divisors is an integer number (10601161549).

Almost surely, 2^21202323097 is an apocalyptic number.

It is an amenable number.

21202323097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202323097 is an equidigital number, since it uses as much as digits as its factorization.

21202323097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The spelling of 21202323097 in words is "twenty-one billion, two hundred two million, three hundred twenty-three thousand, ninety-seven".