1222021112209 has 4 divisors (see below), whose sum is σ = 1222025555520. Its totient is φ = 1222016668900.

The previous prime is 1222021112171. The next prime is 1222021112243. The reversal of 1222021112209 is 9022111202221.

It is a happy number.

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 1222021112209 - 2¹¹ = 1222021110161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222021110209) 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, 1779829 + ... + 2368930.

It is an arithmetic number, because the mean of its divisors is an integer number (305506388880).

Almost surely, 2^{1222021112209} is an apocalyptic number.

It is an amenable number.

1222021112209 is a deficient number, since it is larger than the sum of its proper divisors (4443311).

1222021112209 is an equidigital number, since it uses as much as digits as its factorization.

1222021112209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443310.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 1222021112209 in words is "one trillion, two hundred twenty-two billion, twenty-one million, one hundred twelve thousand, two hundred nine".