2012010209 has 4 divisors (see below), whose sum is σ = 2194920240. Its totient is φ = 1829100180.

The previous prime is 2012010173. The next prime is 2012010211. The reversal of 2012010209 is 9020102102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2012010209 - 2⁸ = 2012009953 is a prime.

It is a super-2 number, since 2×2012010209² = 8096370162240447362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012010229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91454999 + ... + 91455020.

It is an arithmetic number, because the mean of its divisors is an integer number (548730060).

Almost surely, 2^2012010209 is an apocalyptic number.

It is an amenable number.

2012010209 is a deficient number, since it is larger than the sum of its proper divisors (182910031).

2012010209 is a wasteful number, since it uses less digits than its factorization.

2012010209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182910030.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2012010209 is about 44855.4367830701. The cubic root of 2012010209 is about 1262.4380042622.

The spelling of 2012010209 in words is "two billion, twelve million, ten thousand, two hundred nine".