2109191212 has 6 divisors (see below), whose sum is σ = 3691084628. Its totient is φ = 1054595604.

The previous prime is 2109191209. The next prime is 2109191221. The reversal of 2109191212 is 2121919012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263648898 + ... + 263648905.

Almost surely, 2^2109191212 is an apocalyptic number.

It is an amenable number.

2109191212 is a deficient number, since it is larger than the sum of its proper divisors (1581893416).

2109191212 is a wasteful number, since it uses less digits than its factorization.

2109191212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527297807 (or 527297805 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 2109191212 is about 45925.9318032852. The cubic root of 2109191212 is about 1282.4447117483. Note that the first 3 decimals are identical.

The spelling of 2109191212 in words is "two billion, one hundred nine million, one hundred ninety-one thousand, two hundred twelve".