221001022210109 has 2 divisors, whose sum is σ = 221001022210110. Its totient is φ = 221001022210108.

The previous prime is 221001022210079. The next prime is 221001022210141. The reversal of 221001022210109 is 901012220100122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134740951193209 + 86260071016900 = 11607797^2 + 9287630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221001022210109 is a prime.

It is a super-3 number, since 3×221001022210109³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221001022210009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500511105054 + 110500511105055.

It is an arithmetic number, because the mean of its divisors is an integer number (110500511105055).

Almost surely, 2^{221001022210109} is an apocalyptic number.

It is an amenable number.

221001022210109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001022210109 is an equidigital number, since it uses as much as digits as its factorization.

221001022210109 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 221001022210109 in words is "two hundred twenty-one trillion, one billion, twenty-two million, two hundred ten thousand, one hundred nine".