21222000220297 has 2 divisors, whose sum is σ = 21222000220298. Its totient is φ = 21222000220296.

The previous prime is 21222000220259. The next prime is 21222000220301. The reversal of 21222000220297 is 79202200022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18922943702601 + 2299056517696 = 4350051^2 + 1516264^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222000220297 - 2³⁵ = 21187640481929 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222000220207) 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, 10611000110148 + 10611000110149.

It is an arithmetic number, because the mean of its divisors is an integer number (10611000110149).

Almost surely, 2^{21222000220297} is an apocalyptic number.

It is an amenable number.

21222000220297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222000220297 is an equidigital number, since it uses as much as digits as its factorization.

21222000220297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 21222000220297 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty thousand, two hundred ninety-seven".