21222010097 has 2 divisors, whose sum is σ = 21222010098. Its totient is φ = 21222010096.

The previous prime is 21222010013. The next prime is 21222010141. The reversal of 21222010097 is 79001022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14106075361 + 7115934736 = 118769^2 + 84356^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222010097 - 2⁸ = 21222009841 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222010297) 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, 10611005048 + 10611005049.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005049).

Almost surely, 2^21222010097 is an apocalyptic number.

It is an amenable number.

21222010097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222010097 is an equidigital number, since it uses as much as digits as its factorization.

21222010097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The spelling of 21222010097 in words is "twenty-one billion, two hundred twenty-two million, ten thousand, ninety-seven".