2012011209 has 12 divisors (see below), whose sum is σ = 3129795396. Its totient is φ = 1238160672.

The previous prime is 2012011207. The next prime is 2012011249. The reversal of 2012011209 is 9021102102.

It can be written as a sum of positive squares in 2 ways, for example, as 932691600 + 1079319609 = 30540^2 + 32853^2 .

It is not a de Polignac number, because 2012011209 - 2¹ = 2012011207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012011191 and 2012011200.

It is not an unprimeable number, because it can be changed into a prime (2012011207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8598222 + ... + 8598455.

It is an arithmetic number, because the mean of its divisors is an integer number (260816283).

Almost surely, 2^2012011209 is an apocalyptic number.

It is an amenable number.

2012011209 is a deficient number, since it is larger than the sum of its proper divisors (1117784187).

2012011209 is a wasteful number, since it uses less digits than its factorization.

2012011209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17196696 (or 17196693 counting only the distinct ones).

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

The square root of 2012011209 is about 44855.4479299895. The cubic root of 2012011209 is about 1262.4382134125.

It can be divided in two parts, 20120 and 11209, that added together give a square (31329 = 177²).

The spelling of 2012011209 in words is "two billion, twelve million, eleven thousand, two hundred nine".