2122209221 has 4 divisors (see below), whose sum is σ = 2315137344. Its totient is φ = 1929281100.

The previous prime is 2122209211. The next prime is 2122209223. The reversal of 2122209221 is 1229022212.

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 2122209221 - 2²⁶ = 2055100357 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 (2122209223) 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, 96464045 + ... + 96464066.

It is an arithmetic number, because the mean of its divisors is an integer number (578784336).

Almost surely, 2^2122209221 is an apocalyptic number.

It is an amenable number.

2122209221 is a deficient number, since it is larger than the sum of its proper divisors (192928123).

2122209221 is a wasteful number, since it uses less digits than its factorization.

2122209221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192928122.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2122209221 is about 46067.4420930878. The cubic root of 2122209221 is about 1285.0777347535.

The spelling of 2122209221 in words is "two billion, one hundred twenty-two million, two hundred nine thousand, two hundred twenty-one".