21222010101209 has 2 divisors, whose sum is σ = 21222010101210. Its totient is φ = 21222010101208.

The previous prime is 21222010101181. The next prime is 21222010101223. The reversal of 21222010101209 is 90210101022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21170553715609 + 51456385600 = 4601147^2 + 226840^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222010101209 - 2¹⁶ = 21222010035673 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222010101269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611005050604 + 10611005050605.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005050605).

Almost surely, 2^{21222010101209} is an apocalyptic number.

It is an amenable number.

21222010101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222010101209 is an equidigital number, since it uses as much as digits as its factorization.

21222010101209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21222010101209 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred one thousand, two hundred nine".