1112020209 has 6 divisors (see below), whose sum is σ = 1606251426. Its totient is φ = 741346800.

The previous prime is 1112020193. The next prime is 1112020213. The reversal of 1112020209 is 9020202111.

It can be written as a sum of positive squares in only one way, i.e., 771728400 + 340291809 = 27780^2 + 18447^2 .

It is not a de Polignac number, because 1112020209 - 2⁴ = 1112020193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1112020191 and 1112020200.

It is not an unprimeable number, because it can be changed into a prime (1112020219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61778892 + ... + 61778909.

It is an arithmetic number, because the mean of its divisors is an integer number (267708571).

Almost surely, 2^1112020209 is an apocalyptic number.

It is an amenable number.

1112020209 is a deficient number, since it is larger than the sum of its proper divisors (494231217).

1112020209 is a wasteful number, since it uses less digits than its factorization.

1112020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123557807 (or 123557804 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1112020209 is about 33346.9670135081. The cubic root of 1112020209 is about 1036.0265694974.

It can be divided in two parts, 11120 and 20209, that added together give a square (31329 = 177²).

The spelling of 1112020209 in words is "one billion, one hundred twelve million, twenty thousand, two hundred nine".