1110221201809 has 2 divisors, whose sum is σ = 1110221201810. Its totient is φ = 1110221201808.

The previous prime is 1110221201807. The next prime is 1110221201813. The reversal of 1110221201809 is 9081021220111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917135659584 + 193085542225 = 957672^2 + 439415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110221201809 - 2¹ = 1110221201807 is a prime.

It is a super-2 number, since 2×1110221201809² (a number of 25 digits) contains 22 as substring.

Together with 1110221201807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1110221201807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555110600904 + 555110600905.

It is an arithmetic number, because the mean of its divisors is an integer number (555110600905).

Almost surely, 2^{1110221201809} is an apocalyptic number.

It is an amenable number.

1110221201809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110221201809 is an equidigital number, since it uses as much as digits as its factorization.

1110221201809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 1110221201809 in words is "one trillion, one hundred ten billion, two hundred twenty-one million, two hundred one thousand, eight hundred nine".