1109622121 has 2 divisors, whose sum is σ = 1109622122. Its totient is φ = 1109622120.

The previous prime is 1109622109. The next prime is 1109622131. The reversal of 1109622121 is 1212269011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 911375721 + 198246400 = 30189^2 + 14080^2 .

It is an emirp because it is prime and its reverse (1212269011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1109622121 - 2⁵ = 1109622089 is a prime.

It is a super-5 number, since 5×1109622121⁵ (a number of 46 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1109622131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554811060 + 554811061.

It is an arithmetic number, because the mean of its divisors is an integer number (554811061).

Almost surely, 2^1109622121 is an apocalyptic number.

It is an amenable number.

1109622121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109622121 is an equidigital number, since it uses as much as digits as its factorization.

1109622121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1109622121 is about 33310.9909939647. The cubic root of 1109622121 is about 1035.2812979793.

The spelling of 1109622121 in words is "one billion, one hundred nine million, six hundred twenty-two thousand, one hundred twenty-one".