2221221109 has 4 divisors (see below), whose sum is σ = 2222779104. Its totient is φ = 2219663116.

The previous prime is 2221221103. The next prime is 2221221127. The reversal of 2221221109 is 9011221222.

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 2221221109 - 2⁵ = 2221221077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221221109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221221103) 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, 776857 + ... + 779710.

It is an arithmetic number, because the mean of its divisors is an integer number (555694776).

Almost surely, 2^2221221109 is an apocalyptic number.

It is an amenable number.

2221221109 is a deficient number, since it is larger than the sum of its proper divisors (1557995).

2221221109 is a wasteful number, since it uses less digits than its factorization.

2221221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557994.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 2221221109 is about 47129.8324737103. The cubic root of 2221221109 is about 1304.7598896674.

The spelling of 2221221109 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred nine".