2211221102009 has 4 divisors (see below), whose sum is σ = 2212185439716. Its totient is φ = 2210256764304.

The previous prime is 2211221101939. The next prime is 2211221102011. The reversal of 2211221102009 is 9002011221122.

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 657202062400 + 1554019039609 = 810680^2 + 1246603^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211221102009 - 2²⁴ = 2211204324793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211221102059) 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, 482165414 + ... + 482169999.

It is an arithmetic number, because the mean of its divisors is an integer number (553046359929).

Almost surely, 2^{2211221102009} is an apocalyptic number.

It is an amenable number.

2211221102009 is a deficient number, since it is larger than the sum of its proper divisors (964337707).

2211221102009 is an equidigital number, since it uses as much as digits as its factorization.

2211221102009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964337706.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 2211221102009 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, one hundred two thousand, nine".