2100222109 has 4 divisors (see below), whose sum is σ = 2223764604. Its totient is φ = 1976679616.

The previous prime is 2100222107. The next prime is 2100222121. The reversal of 2100222109 is 9012220012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1859506884 + 240715225 = 43122^2 + 15515^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100222109 - 2¹ = 2100222107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100222101) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 61771222 + ... + 61771255.

It is an arithmetic number, because the mean of its divisors is an integer number (555941151).

Almost surely, 2^2100222109 is an apocalyptic number.

It is an amenable number.

2100222109 is a deficient number, since it is larger than the sum of its proper divisors (123542495).

2100222109 is a wasteful number, since it uses less digits than its factorization.

2100222109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123542494.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2100222109 is about 45828.1802933523. The cubic root of 2100222109 is about 1280.6243107225.

The spelling of 2100222109 in words is "two billion, one hundred million, two hundred twenty-two thousand, one hundred nine".