1123200109 has 2 divisors, whose sum is σ = 1123200110. Its totient is φ = 1123200108.

The previous prime is 1123200107. The next prime is 1123200121. The reversal of 1123200109 is 9010023211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973627209 + 149572900 = 31203^2 + 12230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123200109 - 2¹ = 1123200107 is a prime.

It is a super-2 number, since 2×1123200109² = 2523156969715223762, which contains 22 as substring.

Together with 1123200107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123200107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561600054 + 561600055.

It is an arithmetic number, because the mean of its divisors is an integer number (561600055).

Almost surely, 2^1123200109 is an apocalyptic number.

It is an amenable number.

1123200109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123200109 is an equidigital number, since it uses as much as digits as its factorization.

1123200109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1123200109 is about 33514.1777312229. The cubic root of 1123200109 is about 1039.4869600345.

The spelling of 1123200109 in words is "one billion, one hundred twenty-three million, two hundred thousand, one hundred nine".