21222010021109 has 2 divisors, whose sum is σ = 21222010021110. Its totient is φ = 21222010021108.

The previous prime is 21222010021099. The next prime is 21222010021117. The reversal of 21222010021109 is 90112001022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16414611735025 + 4807398286084 = 4051495^2 + 2192578^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222010021109 - 2²⁰ = 21222008972533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222010021129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611005010554 + 10611005010555.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005010555).

Almost surely, 2^{21222010021109} is an apocalyptic number.

It is an amenable number.

21222010021109 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222010021109 is an equidigital number, since it uses as much as digits as its factorization.

21222010021109 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 21222010021109 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, twenty-one thousand, one hundred nine".