221201102189 has 2 divisors, whose sum is σ = 221201102190. Its totient is φ = 221201102188.

The previous prime is 221201102173. The next prime is 221201102207. The reversal of 221201102189 is 981201102122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136709146564 + 84491955625 = 369742^2 + 290675^2 .

It is a cyclic number.

It is not a de Polignac number, because 221201102189 - 2⁴ = 221201102173 is a prime.

It is a super-3 number, since 3×221201102189³ (a number of 35 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221203102189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600551094 + 110600551095.

It is an arithmetic number, because the mean of its divisors is an integer number (110600551095).

Almost surely, 2^221201102189 is an apocalyptic number.

It is an amenable number.

221201102189 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201102189 is an equidigital number, since it uses as much as digits as its factorization.

221201102189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 221201102189 in words is "two hundred twenty-one billion, two hundred one million, one hundred two thousand, one hundred eighty-nine".