2111221206 has 16 divisors (see below), whose sum is σ = 4691602800. Its totient is φ = 703740384.

The previous prime is 2111221193. The next prime is 2111221207. The reversal of 2111221206 is 6021221112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111221207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19548291 + ... + 19548398.

It is an arithmetic number, because the mean of its divisors is an integer number (293225175).

Almost surely, 2^2111221206 is an apocalyptic number.

2111221206 is an abundant number, since it is smaller than the sum of its proper divisors (2580381594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2111221206 is a wasteful number, since it uses less digits than its factorization.

2111221206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39096700 (or 39096694 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2111221206 is about 45948.0272264218. The cubic root of 2111221206 is about 1282.8560100540.

Adding to 2111221206 its reverse (6021221112), we get a palindrome (8132442318).

The spelling of 2111221206 in words is "two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred six".