21303201097 has 2 divisors, whose sum is σ = 21303201098. Its totient is φ = 21303201096.

The previous prime is 21303201079. The next prime is 21303201121. The reversal of 21303201097 is 79010230312.

Together with previous prime (21303201079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10679982336 + 10623218761 = 103344^2 + 103069^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303201097 - 2¹⁵ = 21303168329 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303201037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651600548 + 10651600549.

It is an arithmetic number, because the mean of its divisors is an integer number (10651600549).

Almost surely, 2^21303201097 is an apocalyptic number.

It is an amenable number.

21303201097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303201097 is an equidigital number, since it uses as much as digits as its factorization.

21303201097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The spelling of 21303201097 in words is "twenty-one billion, three hundred three million, two hundred one thousand, ninety-seven".